163557944 has 16 divisors (see below), whose sum is σ = 334550520. Its totient is φ = 74344480.

The previous prime is 163557931. The next prime is 163557959. The reversal of 163557944 is 449755361.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 163557895 and 163557904.

It is a congruent number.

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, 929219 + ... + 929394.

Almost surely, 2^163557944 is an apocalyptic number.

It is an amenable number.

163557944 is an abundant number, since it is smaller than the sum of its proper divisors (170992576).

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

163557944 is a wasteful number, since it uses less digits than its factorization.

163557944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858630 (or 1858626 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 163557944 is about 12788.9774415314. The cubic root of 163557944 is about 546.8781193357.

The spelling of 163557944 in words is "one hundred sixty-three million, five hundred fifty-seven thousand, nine hundred forty-four".