8731625631 has 16 divisors (see below), whose sum is σ = 12567260160. Its totient is φ = 5375992160.

The previous prime is 8731625627. The next prime is 8731625659. The reversal of 8731625631 is 1365261378.

It is not a de Polignac number, because 8731625631 - 2² = 8731625627 is a prime.

It is a super-2 number, since 2×8731625631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8731625131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179815 + ... + 2183816.

It is an arithmetic number, because the mean of its divisors is an integer number (785453760).

Almost surely, 2^8731625631 is an apocalyptic number.

8731625631 is a deficient number, since it is larger than the sum of its proper divisors (3835634529).

8731625631 is a wasteful number, since it uses less digits than its factorization.

8731625631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363686.

The product of its digits is 181440, while the sum is 42.

The square root of 8731625631 is about 93443.1679203996. The cubic root of 8731625631 is about 2059.1992387582.

The spelling of 8731625631 in words is "eight billion, seven hundred thirty-one million, six hundred twenty-five thousand, six hundred thirty-one".