161044992 has 60 divisors (see below), whose sum is σ = 464800050. Its totient is φ = 53680128.

The previous prime is 161044987. The next prime is 161045023. The reversal of 161044992 is 299440161.

It is a happy number.

161044992 is a `hidden beast` number, since 161 + 0 + 4 + 499 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159365376 + 1679616 = 12624^2 + 1296^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12867 + ... + 22082.

Almost surely, 2^161044992 is an apocalyptic number.

161044992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161044992 is an abundant number, since it is smaller than the sum of its proper divisors (303755058).

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

161044992 is an equidigital number, since it uses as much as digits as its factorization.

161044992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34973 (or 34954 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 161044992 is about 12690.3503497736. The cubic root of 161044992 is about 544.0628531760.

The spelling of 161044992 in words is "one hundred sixty-one million, forty-four thousand, nine hundred ninety-two".