79388356099521 has 192 divisors, whose sum is σ = 129865552404480. Its totient is φ = 42214469068800.

The previous prime is 79388356099519. The next prime is 79388356099553. The reversal of 79388356099521 is 12599065388397.

It is not a de Polignac number, because 79388356099521 - 2¹ = 79388356099519 is a prime.

It is a super-2 number, since 2×79388356099521² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79388356099501) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 32443135720 + ... + 32443138166.

It is an arithmetic number, because the mean of its divisors is an integer number (676383085440).

Almost surely, 2^{79388356099521} is an apocalyptic number.

It is an amenable number.

79388356099521 is a deficient number, since it is larger than the sum of its proper divisors (50477196304959).

79388356099521 is a wasteful number, since it uses less digits than its factorization.

79388356099521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 881798400, while the sum is 75.

The spelling of 79388356099521 in words is "seventy-nine trillion, three hundred eighty-eight billion, three hundred fifty-six million, ninety-nine thousand, five hundred twenty-one".