79459329565921 has 4 divisors (see below), whose sum is σ = 79461333169200. Its totient is φ = 79457325962644.

The previous prime is 79459329565909. The next prime is 79459329565943. The reversal of 79459329565921 is 12956592395497.

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 a cyclic number.

It is not a de Polignac number, because 79459329565921 - 2⁴⁵ = 44274957477089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79459329565981) 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, 1001742151 + ... + 1001821468.

It is an arithmetic number, because the mean of its divisors is an integer number (19865333292300).

Almost surely, 2^{79459329565921} is an apocalyptic number.

It is an amenable number.

79459329565921 is a deficient number, since it is larger than the sum of its proper divisors (2003603279).

79459329565921 is a wasteful number, since it uses less digits than its factorization.

79459329565921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003603278.

The product of its digits is 1653372000, while the sum is 76.

The spelling of 79459329565921 in words is "seventy-nine trillion, four hundred fifty-nine billion, three hundred twenty-nine million, five hundred sixty-five thousand, nine hundred twenty-one".