161180177873 has 16 divisors (see below), whose sum is σ = 189449874432. Its totient is φ = 135190848000.

The previous prime is 161180177869. The next prime is 161180177881. The reversal of 161180177873 is 378771081161.

It is not a de Polignac number, because 161180177873 - 2² = 161180177869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161180177813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26768 + ... + 568398.

It is an arithmetic number, because the mean of its divisors is an integer number (11840617152).

Almost surely, 2^161180177873 is an apocalyptic number.

161180177873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161180177873 is a deficient number, since it is larger than the sum of its proper divisors (28269696559).

161180177873 is a wasteful number, since it uses less digits than its factorization.

161180177873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543736.

The product of its (nonzero) digits is 395136, while the sum is 50.

The spelling of 161180177873 in words is "one hundred sixty-one billion, one hundred eighty million, one hundred seventy-seven thousand, eight hundred seventy-three".