79905991922 has 8 divisors (see below), whose sum is σ = 126909516636. Its totient is φ = 37602819712.

The previous prime is 79905991909. The next prime is 79905991927. The reversal of 79905991922 is 22919950997.

It can be written as a sum of positive squares in 2 ways, for example, as 65233757281 + 14672234641 = 255409^2 + 121129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (79905991927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175088083 + ... + 1175088150.

Almost surely, 2^79905991922 is an apocalyptic number.

79905991922 is a deficient number, since it is larger than the sum of its proper divisors (47003524714).

79905991922 is a wasteful number, since it uses less digits than its factorization.

79905991922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350176252.

The product of its (nonzero) digits is 8266860, while the sum is 62.

The spelling of 79905991922 in words is "seventy-nine billion, nine hundred five million, nine hundred ninety-one thousand, nine hundred twenty-two".