161318544 has 40 divisors (see below), whose sum is σ = 430186752. Its totient is φ = 52037760.

The previous prime is 161318543. The next prime is 161318579. The reversal of 161318544 is 445813161.

It is not an unprimeable number, because it can be changed into a prime (161318543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52719 + ... + 55694.

Almost surely, 2^161318544 is an apocalyptic number.

It is an amenable number.

161318544 is an abundant number, since it is smaller than the sum of its proper divisors (268868208).

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

161318544 is a wasteful number, since it uses less digits than its factorization.

161318544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108455 (or 108449 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 161318544 is about 12701.1237298123. The cubic root of 161318544 is about 544.3707284094.

The spelling of 161318544 in words is "one hundred sixty-one million, three hundred eighteen thousand, five hundred forty-four".