80777971968 has 72 divisors (see below), whose sum is σ = 215032070400. Its totient is φ = 26920372224.

The previous prime is 80777971949. The next prime is 80777971993. The reversal of 80777971968 is 86917977708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5421553 + ... + 5436431.

Almost surely, 2^80777971968 is an apocalyptic number.

It is an amenable number.

80777971968 is an abundant number, since it is smaller than the sum of its proper divisors (134254098432).

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

80777971968 is a wasteful number, since it uses less digits than its factorization.

80777971968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21967 (or 21953 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 69.

The spelling of 80777971968 in words is "eighty billion, seven hundred seventy-seven million, nine hundred seventy-one thousand, nine hundred sixty-eight".