79120979806 has 16 divisors (see below), whose sum is σ = 130616456688. Its totient is φ = 35645814400.

The previous prime is 79120979789. The next prime is 79120979909. The reversal of 79120979806 is 60897902197.

It is a happy number.

It is a super-2 number, since 2×79120979806² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15910825 + ... + 15915796.

It is an arithmetic number, because the mean of its divisors is an integer number (8163528543).

Almost surely, 2^79120979806 is an apocalyptic number.

79120979806 is a deficient number, since it is larger than the sum of its proper divisors (51495476882).

79120979806 is a wasteful number, since it uses less digits than its factorization.

79120979806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31826747.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 79120979806 in words is "seventy-nine billion, one hundred twenty million, nine hundred seventy-nine thousand, eight hundred six".