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12871053250990 = 2511177204395539
BaseRepresentation
bin1011101101001100011010…
…0011101001000110101110
31200120110102211102222101121
42323103012203221012232
53141334404113012430
643212514044131154
72465621461332544
oct273230643510656
950513384388347
1012871053250990
114112646015730
12153a5b5836aba
13724973076b2c
14326d687a9d94
15174c14022a7a
hexbb4c68e91ae

12871053250990 has 64 divisors (see below), whose sum is σ = 26761429658880. Its totient is φ = 4404959101440.

The previous prime is 12871053250981. The next prime is 12871053251029. The reversal of 12871053250990 is 9905235017821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134672641 + ... + 134768179.

It is an arithmetic number, because the mean of its divisors is an integer number (418147338420).

Almost surely, 212871053250990 is an apocalyptic number.

12871053250990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12871053250990 is an abundant number, since it is smaller than the sum of its proper divisors (13890376407890).

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

12871053250990 is a wasteful number, since it uses less digits than its factorization.

12871053250990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167617.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 12871053250990 in words is "twelve trillion, eight hundred seventy-one billion, fifty-three million, two hundred fifty thousand, nine hundred ninety".

Divisors: 1 2 5 10 11 17 22 34 55 85 110 170 187 374 935 1870 72043 95539 144086 191078 360215 477695 720430 792473 955390 1050929 1224731 1584946 1624163 2101858 2449462 3248326 3962365 5254645 6123655 7924730 8120815 10509290 12247310 13472041 16241630 17865793 26944082 35731586 67360205 89328965 134720410 178657930 6882916177 13765832354 34414580885 68829161770 75712077947 117009575009 151424155894 234019150018 378560389735 585047875045 757120779470 1170095750090 1287105325099 2574210650198 6435526625495 12871053250990