125616311631 has 12 divisors (see below), whose sum is σ = 181552979608. Its totient is φ = 83694732624.

The previous prime is 125616311629. The next prime is 125616311659. The reversal of 125616311631 is 136113616521.

125616311631 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 1 + 6 + 3 + 11 + 631 = 666.

It is not a de Polignac number, because 125616311631 - 2¹ = 125616311629 is a prime.

It is a super-2 number, since 2×125616311631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125616311621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4106845 + ... + 4137318.

Almost surely, 2^125616311631 is an apocalyptic number.

125616311631 is a deficient number, since it is larger than the sum of its proper divisors (55936667977).

125616311631 is a wasteful number, since it uses less digits than its factorization.

125616311631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245862 (or 8245859 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 125616311631 in words is "one hundred twenty-five billion, six hundred sixteen million, three hundred eleven thousand, six hundred thirty-one".