80640840468020 has 96 divisors (see below), whose sum is σ = 205018781909760. Its totient is φ = 26009705502720.

The previous prime is 80640840467959. The next prime is 80640840468049. The reversal of 80640840468020 is 2086404804608.

It is a self number, because there is not a number n which added to its sum of digits gives 80640840468020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2878175 + ... + 13021734.

It is an arithmetic number, because the mean of its divisors is an integer number (2135612311560).

Almost surely, 2^{80640840468020} is an apocalyptic number.

It is an amenable number.

80640840468020 is an abundant number, since it is smaller than the sum of its proper divisors (124377941441740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80640840468020 is a wasteful number, since it uses less digits than its factorization.

80640840468020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15902073 (or 15902071 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 50.

The spelling of 80640840468020 in words is "eighty trillion, six hundred forty billion, eight hundred forty million, four hundred sixty-eight thousand, twenty".