161609608 has 16 divisors (see below), whose sum is σ = 303298560. Its totient is φ = 80730000.

The previous prime is 161609593. The next prime is 161609627. The reversal of 161609608 is 806906161.

161609608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161609608² = 52235330795827328, which contains 22 as substring.

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, 433 + ... + 17983.

It is an arithmetic number, because the mean of its divisors is an integer number (18956160).

Almost surely, 2^161609608 is an apocalyptic number.

It is an amenable number.

161609608 is a deficient number, since it is larger than the sum of its proper divisors (141688952).

161609608 is a wasteful number, since it uses less digits than its factorization.

161609608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18708 (or 18704 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 161609608 is about 12712.5767647633. The cubic root of 161609608 is about 544.6979309720.

The spelling of 161609608 in words is "one hundred sixty-one million, six hundred nine thousand, six hundred eight".