161874732 has 12 divisors (see below), whose sum is σ = 377707736. Its totient is φ = 53958240.

The previous prime is 161874719. The next prime is 161874733. The reversal of 161874732 is 237478161.

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

It is not an unprimeable number, because it can be changed into a prime (161874733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6744769 + ... + 6744792.

Almost surely, 2^161874732 is an apocalyptic number.

161874732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161874732 is an abundant number, since it is smaller than the sum of its proper divisors (215833004).

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

161874732 is a wasteful number, since it uses less digits than its factorization.

161874732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489568 (or 13489566 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 161874732 is about 12723.0001178967. Note that the first 3 decimals coincide. The cubic root of 161874732 is about 544.9956310847.

The spelling of 161874732 in words is "one hundred sixty-one million, eight hundred seventy-four thousand, seven hundred thirty-two".