161877875 has 16 divisors (see below), whose sum is σ = 202849920. Its totient is φ = 128972800.

The previous prime is 161877857. The next prime is 161877899. The reversal of 161877875 is 578778161.

It is a happy number.

It is not a de Polignac number, because 161877875 - 2⁸ = 161877619 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29606 + ... + 34644.

It is an arithmetic number, because the mean of its divisors is an integer number (12678120).

Almost surely, 2^161877875 is an apocalyptic number.

161877875 is a deficient number, since it is larger than the sum of its proper divisors (40972045).

161877875 is an equidigital number, since it uses as much as digits as its factorization.

161877875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311 (or 5301 counting only the distinct ones).

The product of its digits is 658560, while the sum is 50.

The square root of 161877875 is about 12723.1236337623. The cubic root of 161877875 is about 544.9991583187. Note that the first 3 decimals are identical.

The spelling of 161877875 in words is "one hundred sixty-one million, eight hundred seventy-seven thousand, eight hundred seventy-five".