161963624 has 32 divisors (see below), whose sum is σ = 325182600. Its totient is φ = 75356160.

The previous prime is 161963611. The next prime is 161963663. The reversal of 161963624 is 426369161.

It can be written as a sum of positive squares in 4 ways, for example, as 106461124 + 55502500 = 10318^2 + 7450^2 .

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, 5414 + ... + 18794.

Almost surely, 2^161963624 is an apocalyptic number.

It is an amenable number.

161963624 is an abundant number, since it is smaller than the sum of its proper divisors (163218976).

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

161963624 is a wasteful number, since it uses less digits than its factorization.

161963624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13493 (or 13489 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 161963624 is about 12726.4929968943. The cubic root of 161963624 is about 545.0953725862.

The spelling of 161963624 in words is "one hundred sixty-one million, nine hundred sixty-three thousand, six hundred twenty-four".