161607808 has 32 divisors (see below), whose sum is σ = 328815360. Its totient is φ = 79081728.

The previous prime is 161607781. The next prime is 161607893. The reversal of 161607808 is 808706161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×161607808² = 52234167213129728, 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, 7416 + ... + 19447.

It is an arithmetic number, because the mean of its divisors is an integer number (10275480).

Almost surely, 2^161607808 is an apocalyptic number.

It is an amenable number.

161607808 is an abundant number, since it is smaller than the sum of its proper divisors (167207552).

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

161607808 is an equidigital number, since it uses as much as digits as its factorization.

161607808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26924 (or 26912 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 161607808 is about 12712.5059685335. The cubic root of 161607808 is about 544.6959086914.

It can be divided in two parts, 16 and 1607808, that added together give a square (1607824 = 1268²).

The spelling of 161607808 in words is "one hundred sixty-one million, six hundred seven thousand, eight hundred eight".