161154564 has 48 divisors (see below), whose sum is σ = 383755008. Its totient is φ = 52623648.

The previous prime is 161154563. The next prime is 161154571. The reversal of 161154564 is 465451161.

It is not an unprimeable number, because it can be changed into a prime (161154563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182067 + ... + 182949.

It is an arithmetic number, because the mean of its divisors is an integer number (7994896).

Almost surely, 2^161154564 is an apocalyptic number.

It is an amenable number.

161154564 is an abundant number, since it is smaller than the sum of its proper divisors (222600444).

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

161154564 is a wasteful number, since it uses less digits than its factorization.

161154564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1182 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 161154564 is about 12694.6667541925. Note that the first 3 decimals coincide. The cubic root of 161154564 is about 544.1862152651.

The spelling of 161154564 in words is "one hundred sixty-one million, one hundred fifty-four thousand, five hundred sixty-four".