161742879232 has 80 divisors (see below), whose sum is σ = 360050562432. Its totient is φ = 71955128320.

The previous prime is 161742879229. The next prime is 161742879241. The reversal of 161742879232 is 232978247161.

It is a self number, because there is not a number n which added to its sum of digits gives 161742879232.

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, 40813 + ... + 570220.

Almost surely, 2^161742879232 is an apocalyptic number.

It is an amenable number.

161742879232 is an abundant number, since it is smaller than the sum of its proper divisors (198307683200).

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

161742879232 is an equidigital number, since it uses as much as digits as its factorization.

161742879232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611109 (or 611093 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The spelling of 161742879232 in words is "one hundred sixty-one billion, seven hundred forty-two million, eight hundred seventy-nine thousand, two hundred thirty-two".