80656121771864 has 16 divisors (see below), whose sum is σ = 151231798920600. Its totient is φ = 40327642059712.

The previous prime is 80656121771809. The next prime is 80656121771873. The reversal of 80656121771864 is 46817712165608.

It is a junction number, because it is equal to n+sod(n) for n = 80656121771797 and 80656121771806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51534074 + ... + 53076105.

Almost surely, 2^{80656121771864} is an apocalyptic number.

It is an amenable number.

80656121771864 is a deficient number, since it is larger than the sum of its proper divisors (70575677148736).

80656121771864 is a wasteful number, since it uses less digits than its factorization.

80656121771864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104706562 (or 104706558 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 80656121771864 in words is "eighty trillion, six hundred fifty-six billion, one hundred twenty-one million, seven hundred seventy-one thousand, eight hundred sixty-four".