125811625981672 has 32 divisors (see below), whose sum is σ = 239706347416200. Its totient is φ = 61897430605824.

The previous prime is 125811625981649. The next prime is 125811625981697. The reversal of 125811625981672 is 276189526118521.

It can be written as a sum of positive squares in 4 ways, for example, as 125791163823556 + 20462158116 = 11215666^2 + 143046^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468444897 + ... + 468713392.

Almost surely, 2^{125811625981672} is an apocalyptic number.

It is an amenable number.

125811625981672 is a deficient number, since it is larger than the sum of its proper divisors (113894721434528).

125811625981672 is a wasteful number, since it uses less digits than its factorization.

125811625981672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937158565 (or 937158561 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 64.

The spelling of 125811625981672 in words is "one hundred twenty-five trillion, eight hundred eleven billion, six hundred twenty-five million, nine hundred eighty-one thousand, six hundred seventy-two".