7664615631 has 16 divisors (see below), whose sum is σ = 12022927200. Its totient is φ = 4809170304.

The previous prime is 7664615587. The next prime is 7664615659. The reversal of 7664615631 is 1365164667.

7664615631 is a `hidden beast` number, since 7 + 6 + 6 + 4 + 6 + 1 + 5 + 631 = 666.

It is not a de Polignac number, because 7664615631 - 2²⁵ = 7631061199 is a prime.

It is a super-2 number, since 2×7664615631² (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 (7664615681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8348796 + ... + 8349713.

It is an arithmetic number, because the mean of its divisors is an integer number (751432950).

Almost surely, 2^7664615631 is an apocalyptic number.

7664615631 is a deficient number, since it is larger than the sum of its proper divisors (4358311569).

7664615631 is a wasteful number, since it uses less digits than its factorization.

7664615631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16698535 (or 16698529 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 7664615631 is about 87547.7905546451. The cubic root of 7664615631 is about 1971.6513789428.

The spelling of 7664615631 in words is "seven billion, six hundred sixty-four million, six hundred fifteen thousand, six hundred thirty-one".