161776207215204 has 24 divisors (see below), whose sum is σ = 379563329640768. Its totient is φ = 53627472004320.

The previous prime is 161776207215167. The next prime is 161776207215221. The reversal of 161776207215204 is 402512702677161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37241297832 + ... + 37241302175.

It is an arithmetic number, because the mean of its divisors is an integer number (15815138735032).

Almost surely, 2^{161776207215204} is an apocalyptic number.

It is an amenable number.

161776207215204 is an abundant number, since it is smaller than the sum of its proper divisors (217787122425564).

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

161776207215204 is a wasteful number, since it uses less digits than its factorization.

161776207215204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74482600195 (or 74482600193 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 161776207215204 in words is "one hundred sixty-one trillion, seven hundred seventy-six billion, two hundred seven million, two hundred fifteen thousand, two hundred four".