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12870528723 = 331336668173
BaseRepresentation
bin10111111110010010…
…01010111011010011
31020012222011121021000
423333021022323103
5202324323404343
65525044033043
7633641455233
oct137711127323
936188147230
1012870528723
1155050947a8
1225b2392783
1312a160ca90
148a14a5cc3
15504dc9ed3
hex2ff24aed3

12870528723 has 16 divisors (see below), whose sum is σ = 20534177440. Its totient is φ = 7920325152.

The previous prime is 12870528721. The next prime is 12870528751. The reversal of 12870528723 is 32782507821.

It is not a de Polignac number, because 12870528723 - 21 = 12870528721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12870528721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18333736 + ... + 18334437.

It is an arithmetic number, because the mean of its divisors is an integer number (1283386090).

Almost surely, 212870528723 is an apocalyptic number.

12870528723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12870528723 is a deficient number, since it is larger than the sum of its proper divisors (7663648717).

12870528723 is a wasteful number, since it uses less digits than its factorization.

12870528723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36668195 (or 36668189 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 12870528723 in words is "twelve billion, eight hundred seventy million, five hundred twenty-eight thousand, seven hundred twenty-three".

Divisors: 1 3 9 13 27 39 117 351 36668173 110004519 330013557 476686249 990040671 1430058747 4290176241 12870528723