161547976 has 16 divisors (see below), whose sum is σ = 304834140. Its totient is φ = 80258880.

The previous prime is 161547961. The next prime is 161548039. The reversal of 161547976 is 679745161.

It can be written as a sum of positive squares in 2 ways, for example, as 143280900 + 18267076 = 11970^2 + 4274^2 .

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, 63055 + ... + 65566.

Almost surely, 2^161547976 is an apocalyptic number.

It is an amenable number.

161547976 is a deficient number, since it is larger than the sum of its proper divisors (143286164).

161547976 is a wasteful number, since it uses less digits than its factorization.

161547976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128784 (or 128780 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 161547976 is about 12710.1524774489. The cubic root of 161547976 is about 544.6286795379.

The spelling of 161547976 in words is "one hundred sixty-one million, five hundred forty-seven thousand, nine hundred seventy-six".