79221264631 has 2 divisors, whose sum is σ = 79221264632. Its totient is φ = 79221264630.

The previous prime is 79221264601. The next prime is 79221264667. The reversal of 79221264631 is 13646212297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79221264631 - 2²¹ = 79219167479 is a prime.

It is a super-2 number, since 2×79221264631² (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 (79221264601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39610632315 + 39610632316.

It is an arithmetic number, because the mean of its divisors is an integer number (39610632316).

Almost surely, 2^79221264631 is an apocalyptic number.

79221264631 is a deficient number, since it is larger than the sum of its proper divisors (1).

79221264631 is an equidigital number, since it uses as much as digits as its factorization.

79221264631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The spelling of 79221264631 in words is "seventy-nine billion, two hundred twenty-one million, two hundred sixty-four thousand, six hundred thirty-one".