161365523275 has 24 divisors (see below), whose sum is σ = 218488136400. Its totient is φ = 117246748800.

The previous prime is 161365523269. The next prime is 161365523287. The reversal of 161365523275 is 572325563161.

It is not a de Polignac number, because 161365523275 - 2¹¹ = 161365521227 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19521 + ... + 568429.

It is an arithmetic number, because the mean of its divisors is an integer number (9103672350).

Almost surely, 2^161365523275 is an apocalyptic number.

161365523275 is a deficient number, since it is larger than the sum of its proper divisors (57122613125).

161365523275 is a wasteful number, since it uses less digits than its factorization.

161365523275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549999 (or 549994 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 46.

The spelling of 161365523275 in words is "one hundred sixty-one billion, three hundred sixty-five million, five hundred twenty-three thousand, two hundred seventy-five".