79221264651 has 16 divisors (see below), whose sum is σ = 117397465120. Its totient is φ = 52799493600.

The previous prime is 79221264631. The next prime is 79221264667. The reversal of 79221264651 is 15646212297.

It is not a de Polignac number, because 79221264651 - 2²⁵ = 79187710219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79221264597 and 79221264606.

It is not an unprimeable number, because it can be changed into a prime (79221264601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308500 + ... + 503601.

It is an arithmetic number, because the mean of its divisors is an integer number (7337341570).

Almost surely, 2^79221264651 is an apocalyptic number.

79221264651 is a deficient number, since it is larger than the sum of its proper divisors (38176200469).

79221264651 is a wasteful number, since it uses less digits than its factorization.

79221264651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815723 (or 815717 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 79221264651 in words is "seventy-nine billion, two hundred twenty-one million, two hundred sixty-four thousand, six hundred fifty-one".