79121277822 has 16 divisors (see below), whose sum is σ = 158545128960. Its totient is φ = 26323330392.

The previous prime is 79121277817. The next prime is 79121277881. The reversal of 79121277822 is 22877212197.

It is a happy number.

It is a super-2 number, since 2×79121277822² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12603822 + ... + 12610097.

It is an arithmetic number, because the mean of its divisors is an integer number (9909070560).

Almost surely, 2^79121277822 is an apocalyptic number.

79121277822 is an abundant number, since it is smaller than the sum of its proper divisors (79423851138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79121277822 is a wasteful number, since it uses less digits than its factorization.

79121277822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25214447.

The product of its digits is 395136, while the sum is 48.

The spelling of 79121277822 in words is "seventy-nine billion, one hundred twenty-one million, two hundred seventy-seven thousand, eight hundred twenty-two".