161594944 has 63 divisors (see below), whose sum is σ = 374668923. Its totient is φ = 68949888.

The previous prime is 161594929. The next prime is 161594957. The reversal of 161594944 is 449495161.

The square root of 161594944 is 12712.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×161594944² = 52225851852726272, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (155520) is a multiple of the sum of its prime factors (480).

It is a self number, because there is not a number n which added to its sum of digits gives 161594944.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 711759 + ... + 711985.

Almost surely, 2^161594944 is an apocalyptic number.

161594944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161594944 is the 12712-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161594944

161594944 is an abundant number, since it is smaller than the sum of its proper divisors (213073979).

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

161594944 is an frugal number, since it uses more digits than its factorization.

161594944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 236 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The cubic root of 161594944 is about 544.6814556890.

The spelling of 161594944 in words is "one hundred sixty-one million, five hundred ninety-four thousand, nine hundred forty-four".