80977776016 has 20 divisors (see below), whose sum is σ = 162304595100. Its totient is φ = 39092719232.

The previous prime is 80977775947. The next prime is 80977776049. The reversal of 80977776016 is 61067777908.

It can be written as a sum of positive squares in 2 ways, for example, as 66265056400 + 14712719616 = 257420^2 + 121296^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

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, 87260071 + ... + 87260998.

It is an arithmetic number, because the mean of its divisors is an integer number (8115229755).

Almost surely, 2^80977776016 is an apocalyptic number.

It is an amenable number.

80977776016 is an abundant number, since it is smaller than the sum of its proper divisors (81326819084).

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

80977776016 is a wasteful number, since it uses less digits than its factorization.

80977776016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174521106 (or 174521100 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 58.

The spelling of 80977776016 in words is "eighty billion, nine hundred seventy-seven million, seven hundred seventy-six thousand, sixteen".