80557161173 has 4 divisors (see below), whose sum is σ = 80870613420. Its totient is φ = 80243708928.

The previous prime is 80557161151. The next prime is 80557161203. The reversal of 80557161173 is 37116175508.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71662219204 + 8894941969 = 267698^2 + 94313^2 .

It is a cyclic number.

It is not a de Polignac number, because 80557161173 - 2²⁰ = 80556112597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80557161133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156725738 + ... + 156726251.

It is an arithmetic number, because the mean of its divisors is an integer number (20217653355).

Almost surely, 2^80557161173 is an apocalyptic number.

It is an amenable number.

80557161173 is a deficient number, since it is larger than the sum of its proper divisors (313452247).

80557161173 is a wasteful number, since it uses less digits than its factorization.

80557161173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313452246.

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 80557161173 in words is "eighty billion, five hundred fifty-seven million, one hundred sixty-one thousand, one hundred seventy-three".