161779752192 has 72 divisors (see below), whose sum is σ = 430680529440. Its totient is φ = 53912750080.

The previous prime is 161779752163. The next prime is 161779752229. The reversal of 161779752192 is 291257977161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3222967 + ... + 3272777.

It is an arithmetic number, because the mean of its divisors is an integer number (5981674020).

Almost surely, 2^161779752192 is an apocalyptic number.

161779752192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161779752192 is an abundant number, since it is smaller than the sum of its proper divisors (268900777248).

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

161779752192 is an equidigital number, since it uses as much as digits as its factorization.

161779752192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54059 (or 54045 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 57.

The spelling of 161779752192 in words is "one hundred sixty-one billion, seven hundred seventy-nine million, seven hundred fifty-two thousand, one hundred ninety-two".