161332718224 has 20 divisors (see below), whose sum is σ = 329033833840. Its totient is φ = 76420761120.

The previous prime is 161332718213. The next prime is 161332718293. The reversal of 161332718224 is 422817233161.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265349562 + ... + 265350169.

It is an arithmetic number, because the mean of its divisors is an integer number (16451691692).

Almost surely, 2^161332718224 is an apocalyptic number.

It is an amenable number.

161332718224 is an abundant number, since it is smaller than the sum of its proper divisors (167701115616).

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

161332718224 is a wasteful number, since it uses less digits than its factorization.

161332718224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530699758 (or 530699752 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The spelling of 161332718224 in words is "one hundred sixty-one billion, three hundred thirty-two million, seven hundred eighteen thousand, two hundred twenty-four".