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12905743785760 = 255721646140789
BaseRepresentation
bin1011101111001101101001…
…0001100001111100100000
31200200202222110210201211201
42323303122101201330200
53142421430402121020
643240452234450544
72501260235115100
oct273633221417440
950622873721751
1012905743785760
114126327a07981
121545277593a54
13728011137697
143288d9b5b200
15175a94824a0a
hexbbcda461f20

12905743785760 has 72 divisors (see below), whose sum is σ = 35467749461340. Its totient is φ = 4424826438144.

The previous prime is 12905743785751. The next prime is 12905743785763. The reversal of 12905743785760 is 6758734750921.

12905743785760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11797768604944 + 1107975180816 = 3434788^2 + 1052604^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12905743785692 and 12905743785701.

It is not an unprimeable number, because it can be changed into a prime (12905743785763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 823062555 + ... + 823078234.

It is a 1-persistent number, because it is pandigital, but 2⋅12905743785760 = 25811487571520 is not.

Almost surely, 212905743785760 is an apocalyptic number.

12905743785760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12905743785760 is an abundant number, since it is smaller than the sum of its proper divisors (22562005675580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12905743785760 is a wasteful number, since it uses less digits than its factorization.

12905743785760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646140818 (or 1646140803 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 64.

The spelling of 12905743785760 in words is "twelve trillion, nine hundred five billion, seven hundred forty-three million, seven hundred eighty-five thousand, seven hundred sixty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 32 35 40 49 56 70 80 98 112 140 160 196 224 245 280 392 490 560 784 980 1120 1568 1960 3920 7840 1646140789 3292281578 6584563156 8230703945 11522985523 13169126312 16461407890 23045971046 26338252624 32922815780 46091942092 52676505248 57614927615 65845631560 80660898661 92183884184 115229855230 131691263120 161321797322 184367768368 230459710460 263382526240 322643594644 368735536736 403304493305 460919420920 645287189288 806608986610 921838841840 1290574378576 1613217973220 1843677683680 2581148757152 3226435946440 6452871892880 12905743785760