79902023311321 has 64 divisors (see below), whose sum is σ = 89439552000000. Its totient is φ = 71035477373952.

The previous prime is 79902023311309. The next prime is 79902023311381. The reversal of 79902023311321 is 12311332020997.

It is a cyclic number.

It is not a de Polignac number, because 79902023311321 - 2²⁵ = 79901989756889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79902023311381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1972917930 + ... + 1972958428.

It is an arithmetic number, because the mean of its divisors is an integer number (1397493000000).

Almost surely, 2^{79902023311321} is an apocalyptic number.

It is an amenable number.

79902023311321 is a deficient number, since it is larger than the sum of its proper divisors (9537528688679).

79902023311321 is a wasteful number, since it uses less digits than its factorization.

79902023311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41086.

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 79902023311321 in words is "seventy-nine trillion, nine hundred two billion, twenty-three million, three hundred eleven thousand, three hundred twenty-one".