79054022721 has 4 divisors (see below), whose sum is σ = 105405363632. Its totient is φ = 52702681812.

The previous prime is 79054022687. The next prime is 79054022743. The reversal of 79054022721 is 12722045097.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79054022721 - 2¹¹ = 79054020673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79054022721.

It is not an unprimeable number, because it can be changed into a prime (79054022791) 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, 13175670451 + ... + 13175670456.

It is an arithmetic number, because the mean of its divisors is an integer number (26351340908).

Almost surely, 2^79054022721 is an apocalyptic number.

It is an amenable number.

79054022721 is a deficient number, since it is larger than the sum of its proper divisors (26351340911).

79054022721 is a wasteful number, since it uses less digits than its factorization.

79054022721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26351340910.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 79054022721 in words is "seventy-nine billion, fifty-four million, twenty-two thousand, seven hundred twenty-one".