161942810816 has 28 divisors (see below), whose sum is σ = 324966009960. Its totient is φ = 80061611520.

The previous prime is 161942810807. The next prime is 161942810819. The reversal of 161942810816 is 618018249161.

It is not an unprimeable number, because it can be changed into a prime (161942810819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14209790 + ... + 14221181.

Almost surely, 2^161942810816 is an apocalyptic number.

161942810816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161942810816 is an abundant number, since it is smaller than the sum of its proper divisors (163023199144).

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

161942810816 is an equidigital number, since it uses as much as digits as its factorization.

161942810816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28431072 (or 28431062 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The spelling of 161942810816 in words is "one hundred sixty-one billion, nine hundred forty-two million, eight hundred ten thousand, eight hundred sixteen".