80657880390 has 48 divisors (see below), whose sum is σ = 210113126496. Its totient is φ = 21467472000.

The previous prime is 80657880367. The next prime is 80657880431. The reversal of 80657880390 is 9308875608.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 813186 + ... + 906965.

It is an arithmetic number, because the mean of its divisors is an integer number (4377356802).

Almost surely, 2^80657880390 is an apocalyptic number.

80657880390 is an abundant number, since it is smaller than the sum of its proper divisors (129455246106).

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

80657880390 is a wasteful number, since it uses less digits than its factorization.

80657880390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720685 (or 1720682 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 80657880390 in words is "eighty billion, six hundred fifty-seven million, eight hundred eighty thousand, three hundred ninety".