79105621923 has 16 divisors (see below), whose sum is σ = 117274562560. Its totient is φ = 52700609448.

The previous prime is 79105621891. The next prime is 79105621981. The reversal of 79105621923 is 32912650197.

It is a happy number.

79105621923 is a `hidden beast` number, since 7 + 9 + 10 + 5 + 621 + 9 + 2 + 3 = 666.

It is not a de Polignac number, because 79105621923 - 2⁵ = 79105621891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79105623923) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 973315 + ... + 1051452.

It is an arithmetic number, because the mean of its divisors is an integer number (7329660160).

Almost surely, 2^79105621923 is an apocalyptic number.

79105621923 is a deficient number, since it is larger than the sum of its proper divisors (38168940637).

79105621923 is a wasteful number, since it uses less digits than its factorization.

79105621923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026223 (or 2026217 counting only the distinct ones).

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

The spelling of 79105621923 in words is "seventy-nine billion, one hundred five million, six hundred twenty-one thousand, nine hundred twenty-three".