79136510521 has 8 divisors (see below), whose sum is σ = 81287443584. Its totient is φ = 77005043280.

The previous prime is 79136510441. The next prime is 79136510543. The reversal of 79136510521 is 12501563197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79136510521 - 2¹⁷ = 79136379449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79136510561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4858215 + ... + 4874476.

It is an arithmetic number, because the mean of its divisors is an integer number (10160930448).

Almost surely, 2^79136510521 is an apocalyptic number.

It is an amenable number.

79136510521 is a deficient number, since it is larger than the sum of its proper divisors (2150933063).

79136510521 is a wasteful number, since it uses less digits than its factorization.

79136510521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9732911.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 79136510521 in words is "seventy-nine billion, one hundred thirty-six million, five hundred ten thousand, five hundred twenty-one".