79920736161 has 16 divisors (see below), whose sum is σ = 121822245888. Its totient is φ = 45654642000.

The previous prime is 79920736157. The next prime is 79920736163. The reversal of 79920736161 is 16163702997.

It is not a de Polignac number, because 79920736161 - 2² = 79920736157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79920736163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529315 + ... + 663336.

It is an arithmetic number, because the mean of its divisors is an integer number (7613890368).

Almost surely, 2^79920736161 is an apocalyptic number.

It is an amenable number.

79920736161 is a deficient number, since it is larger than the sum of its proper divisors (41901509727).

79920736161 is a wasteful number, since it uses less digits than its factorization.

79920736161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195852.

The product of its (nonzero) digits is 857304, while the sum is 51.

The spelling of 79920736161 in words is "seventy-nine billion, nine hundred twenty million, seven hundred thirty-six thousand, one hundred sixty-one".