125959521915 has 12 divisors (see below), whose sum is σ = 218329838064. Its totient is φ = 67178411664.

The previous prime is 125959521907. The next prime is 125959521943. The reversal of 125959521915 is 519125959521.

125959521915 is a `hidden beast` number, since 1 + 2 + 59 + 59 + 521 + 9 + 15 = 666.

It is not a de Polignac number, because 125959521915 - 2³ = 125959521907 is a prime.

It is a super-2 number, since 2×125959521915² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1399550199 + ... + 1399550288.

It is an arithmetic number, because the mean of its divisors is an integer number (18194153172).

Almost surely, 2^125959521915 is an apocalyptic number.

125959521915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125959521915 is a deficient number, since it is larger than the sum of its proper divisors (92370316149).

125959521915 is a wasteful number, since it uses less digits than its factorization.

125959521915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799100498 (or 2799100495 counting only the distinct ones).

The product of its digits is 1822500, while the sum is 54.

The spelling of 125959521915 in words is "one hundred twenty-five billion, nine hundred fifty-nine million, five hundred twenty-one thousand, nine hundred fifteen".