79213021659 has 12 divisors (see below), whose sum is σ = 118656543096. Its totient is φ = 52808680944.

The previous prime is 79213021627. The next prime is 79213021663. The reversal of 79213021659 is 95612031297.

It is a happy number.

It is not a de Polignac number, because 79213021659 - 2⁵ = 79213021627 is a prime.

It is a super-2 number, since 2×79213021659² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79213021669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162989514 + ... + 162989999.

It is an arithmetic number, because the mean of its divisors is an integer number (9888045258).

Almost surely, 2^79213021659 is an apocalyptic number.

79213021659 is a deficient number, since it is larger than the sum of its proper divisors (39443521437).

79213021659 is an equidigital number, since it uses as much as digits as its factorization.

79213021659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325979528 (or 325979516 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 79213021659 in words is "seventy-nine billion, two hundred thirteen million, twenty-one thousand, six hundred fifty-nine".