80157940857 has 6 divisors (see below), whose sum is σ = 115783692362. Its totient is φ = 53438627232.

The previous prime is 80157940831. The next prime is 80157940873. The reversal of 80157940857 is 75804975108.

80157940857 is a `hidden beast` number, since 80 + 157 + 9 + 408 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79106625081 + 1051315776 = 281259^2 + 32424^2 .

It is not a de Polignac number, because 80157940857 - 2⁷ = 80157940729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80157940657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4453218928 + ... + 4453218945.

Almost surely, 2^80157940857 is an apocalyptic number.

It is an amenable number.

80157940857 is a deficient number, since it is larger than the sum of its proper divisors (35625751505).

80157940857 is a wasteful number, since it uses less digits than its factorization.

80157940857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906437879 (or 8906437876 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 80157940857 in words is "eighty billion, one hundred fifty-seven million, nine hundred forty thousand, eight hundred fifty-seven".