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12880723525 = 5215716192027
BaseRepresentation
bin10111111111100000…
…00011111001000101
31020020200100112220021
423333300003321011
5202334431123100
65530050335141
7634124225545
oct137760037105
936220315807
1012880723525
11550a91825a
1225b588a4b1
1312a376c1c7
148a299b325
15505c40a1a
hex2ffc03e45

12880723525 has 24 divisors (see below), whose sum is σ = 16091693280. Its totient is φ = 10227572160.

The previous prime is 12880723501. The next prime is 12880723543. The reversal of 12880723525 is 52532708821.

It is not a de Polignac number, because 12880723525 - 27 = 12880723397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6353562 + ... + 6355588.

It is an arithmetic number, because the mean of its divisors is an integer number (670487220).

Almost surely, 212880723525 is an apocalyptic number.

It is an amenable number.

12880723525 is a deficient number, since it is larger than the sum of its proper divisors (3210969755).

12880723525 is a wasteful number, since it uses less digits than its factorization.

12880723525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813 (or 3808 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 12880723525 in words is "twelve billion, eight hundred eighty million, seven hundred twenty-three thousand, five hundred twenty-five".

Divisors: 1 5 25 157 785 1619 2027 3925 8095 10135 40475 50675 254183 318239 1270915 1591195 3281713 6354575 7955975 16408565 82042825 515228941 2576144705 12880723525