161188864 has 22 divisors (see below), whose sum is σ = 322222364. Its totient is φ = 80593920.

The previous prime is 161188843. The next prime is 161188889. The reversal of 161188864 is 468881161.

It is a super-2 number, since 2×161188864² = 51963699755220992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161188864.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77682 + ... + 79729.

Almost surely, 2^161188864 is an apocalyptic number.

It is an amenable number.

161188864 is a deficient number, since it is larger than the sum of its proper divisors (161033500).

161188864 is an equidigital number, since it uses as much as digits as its factorization.

161188864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157431 (or 157413 counting only the distinct ones).

The product of its digits is 73728, while the sum is 43.

The square root of 161188864 is about 12696.0176433400. The cubic root of 161188864 is about 544.2248205697.

The spelling of 161188864 in words is "one hundred sixty-one million, one hundred eighty-eight thousand, eight hundred sixty-four".