80170978920 has 32 divisors (see below), whose sum is σ = 240512937120. Its totient is φ = 21378927680.

The previous prime is 80170978913. The next prime is 80170978931. The reversal of 80170978920 is 2987907108.

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, 334045626 + ... + 334045865.

It is an arithmetic number, because the mean of its divisors is an integer number (7516029285).

Almost surely, 2^80170978920 is an apocalyptic number.

It is an amenable number.

80170978920 is an abundant number, since it is smaller than the sum of its proper divisors (160341958200).

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

80170978920 is a wasteful number, since it uses less digits than its factorization.

80170978920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668091505 (or 668091501 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 80170978920 in words is "eighty billion, one hundred seventy million, nine hundred seventy-eight thousand, nine hundred twenty".