79009513557 has 16 divisors (see below), whose sum is σ = 115142838720. Its totient is φ = 47895547392.

The previous prime is 79009513529. The next prime is 79009513573. The reversal of 79009513557 is 75531590097.

It is not a de Polignac number, because 79009513557 - 2¹⁴ = 79009497173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79009511557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15115932 + ... + 15121157.

It is an arithmetic number, because the mean of its divisors is an integer number (7196427420).

Almost surely, 2^79009513557 is an apocalyptic number.

It is an amenable number.

79009513557 is a deficient number, since it is larger than the sum of its proper divisors (36133325163).

79009513557 is a wasteful number, since it uses less digits than its factorization.

79009513557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30237172.

The product of its (nonzero) digits is 1488375, while the sum is 51.

The spelling of 79009513557 in words is "seventy-nine billion, nine million, five hundred thirteen thousand, five hundred fifty-seven".