79157388623 has 2 divisors, whose sum is σ = 79157388624. Its totient is φ = 79157388622.

The previous prime is 79157388589. The next prime is 79157388679. The reversal of 79157388623 is 32688375197.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79157388623 is a prime.

It is a super-2 number, since 2×79157388623² (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 (79157388223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39578694311 + 39578694312.

It is an arithmetic number, because the mean of its divisors is an integer number (39578694312).

Almost surely, 2^79157388623 is an apocalyptic number.

79157388623 is a deficient number, since it is larger than the sum of its proper divisors (1).

79157388623 is an equidigital number, since it uses as much as digits as its factorization.

79157388623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The spelling of 79157388623 in words is "seventy-nine billion, one hundred fifty-seven million, three hundred eighty-eight thousand, six hundred twenty-three".