161554924 has 24 divisors (see below), whose sum is σ = 290269728. Its totient is φ = 78629760.

The previous prime is 161554909. The next prime is 161554931. The reversal of 161554924 is 429455161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99729 + ... + 101335.

It is an arithmetic number, because the mean of its divisors is an integer number (12094572).

Almost surely, 2^161554924 is an apocalyptic number.

It is an amenable number.

161554924 is a deficient number, since it is larger than the sum of its proper divisors (128714804).

161554924 is a wasteful number, since it uses less digits than its factorization.

161554924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2263 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 161554924 is about 12710.4257993192. The cubic root of 161554924 is about 544.6364873852.

The spelling of 161554924 in words is "one hundred sixty-one million, five hundred fifty-four thousand, nine hundred twenty-four".