79579290591 has 16 divisors (see below), whose sum is σ = 117934650720. Its totient is φ = 53035128000.

The previous prime is 79579290541. The next prime is 79579290599. The reversal of 79579290591 is 19509297597.

79579290591 is a `hidden beast` number, since 7 + 9 + 579 + 2 + 9 + 0 + 59 + 1 = 666.

It is not a de Polignac number, because 79579290591 - 2⁷ = 79579290463 is a prime.

It is a super-2 number, since 2×79579290591² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79579290599) 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, 410040 + ... + 572093.

It is an arithmetic number, because the mean of its divisors is an integer number (7370915670).

Almost surely, 2^79579290591 is an apocalyptic number.

79579290591 is a deficient number, since it is larger than the sum of its proper divisors (38355360129).

79579290591 is a wasteful number, since it uses less digits than its factorization.

79579290591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985143 (or 985137 counting only the distinct ones).

The product of its (nonzero) digits is 16074450, while the sum is 63.

The spelling of 79579290591 in words is "seventy-nine billion, five hundred seventy-nine million, two hundred ninety thousand, five hundred ninety-one".