79140721625 has 16 divisors (see below), whose sum is σ = 112877281920. Its totient is φ = 54267922800.

The previous prime is 79140721609. The next prime is 79140721631. The reversal of 79140721625 is 52612704197.

It is not a de Polignac number, because 79140721625 - 2⁴ = 79140721609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45222395 + ... + 45224144.

It is an arithmetic number, because the mean of its divisors is an integer number (7054830120).

Almost surely, 2^79140721625 is an apocalyptic number.

It is an amenable number.

79140721625 is a deficient number, since it is larger than the sum of its proper divisors (33736560295).

79140721625 is an equidigital number, since it uses as much as digits as its factorization.

79140721625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90446561 (or 90446551 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 79140721625 in words is "seventy-nine billion, one hundred forty million, seven hundred twenty-one thousand, six hundred twenty-five".