161204231874 has 32 divisors (see below), whose sum is σ = 370395979776. Its totient is φ = 45817206480.

The previous prime is 161204231861. The next prime is 161204231897. The reversal of 161204231874 is 478132402161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10039612 + ... + 10055655.

It is an arithmetic number, because the mean of its divisors is an integer number (11574874368).

Almost surely, 2^161204231874 is an apocalyptic number.

161204231874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161204231874 is an abundant number, since it is smaller than the sum of its proper divisors (209191747902).

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

161204231874 is a wasteful number, since it uses less digits than its factorization.

161204231874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20095470.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 161204231874 in words is "one hundred sixty-one billion, two hundred four million, two hundred thirty-one thousand, eight hundred seventy-four".