161688264 has 32 divisors (see below), whose sum is σ = 405073440. Its totient is φ = 53782400.

The previous prime is 161688257. The next prime is 161688269. The reversal of 161688264 is 462886161.

161688264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161688264² = 52286189430667392, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (161688269) 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, 4924 + ... + 18644.

It is an arithmetic number, because the mean of its divisors is an integer number (12658545).

Almost surely, 2^161688264 is an apocalyptic number.

It is an amenable number.

161688264 is an abundant number, since it is smaller than the sum of its proper divisors (243385176).

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

161688264 is a wasteful number, since it uses less digits than its factorization.

161688264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14221 (or 14217 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 161688264 is about 12715.6700177380. The cubic root of 161688264 is about 544.7862854787.

The spelling of 161688264 in words is "one hundred sixty-one million, six hundred eighty-eight thousand, two hundred sixty-four".