79638703631 has 2 divisors, whose sum is σ = 79638703632. Its totient is φ = 79638703630.

The previous prime is 79638703621. The next prime is 79638703667. The reversal of 79638703631 is 13630783697.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79638703631 is a prime.

It is a super-2 number, since 2×79638703631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79638703601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39819351815 + 39819351816.

It is an arithmetic number, because the mean of its divisors is an integer number (39819351816).

Almost surely, 2^79638703631 is an apocalyptic number.

79638703631 is a deficient number, since it is larger than the sum of its proper divisors (1).

79638703631 is an equidigital number, since it uses as much as digits as its factorization.

79638703631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 79638703631 in words is "seventy-nine billion, six hundred thirty-eight million, seven hundred three thousand, six hundred thirty-one".