161883645312 has 64 divisors (see below), whose sum is σ = 430067026800. Its totient is φ = 53953234944.

The previous prime is 161883645299. The next prime is 161883645323. The reversal of 161883645312 is 213546388161.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936014 + ... + 2990642.

Almost surely, 2^161883645312 is an apocalyptic number.

161883645312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161883645312 is an abundant number, since it is smaller than the sum of its proper divisors (268183381488).

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

161883645312 is an equidigital number, since it uses as much as digits as its factorization.

161883645312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62363 (or 62351 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The spelling of 161883645312 in words is "one hundred sixty-one billion, eight hundred eighty-three million, six hundred forty-five thousand, three hundred twelve".