125929755931 has 24 divisors (see below), whose sum is σ = 146981025360. Its totient is φ = 107578239552.

The previous prime is 125929755881. The next prime is 125929755961. The reversal of 125929755931 is 139557929521.

It is a happy number.

It is not a de Polignac number, because 125929755931 - 2¹⁷ = 125929624859 is a prime.

It is a super-2 number, since 2×125929755931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125929755961) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 44925376 + ... + 44928178.

It is an arithmetic number, because the mean of its divisors is an integer number (6124209390).

Almost surely, 2^125929755931 is an apocalyptic number.

125929755931 is a deficient number, since it is larger than the sum of its proper divisors (21051269429).

125929755931 is a wasteful number, since it uses less digits than its factorization.

125929755931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563 (or 5556 counting only the distinct ones).

The product of its digits is 7654500, while the sum is 58.

The spelling of 125929755931 in words is "one hundred twenty-five billion, nine hundred twenty-nine million, seven hundred fifty-five thousand, nine hundred thirty-one".