161599908 has 12 divisors (see below), whose sum is σ = 377066480. Its totient is φ = 53866632.

The previous prime is 161599903. The next prime is 161599927. The reversal of 161599908 is 809995161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×161599908² = 52229060531216928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161599903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6733318 + ... + 6733341.

Almost surely, 2^161599908 is an apocalyptic number.

It is an amenable number.

161599908 is an abundant number, since it is smaller than the sum of its proper divisors (215466572).

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

161599908 is a wasteful number, since it uses less digits than its factorization.

161599908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13466666 (or 13466664 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 161599908 is about 12712.1952470846. The cubic root of 161599908 is about 544.6870329490.

The spelling of 161599908 in words is "one hundred sixty-one million, five hundred ninety-nine thousand, nine hundred eight".