161498889984 has 72 divisors (see below), whose sum is σ = 429902583040. Its totient is φ = 53822942208.

The previous prime is 161498889971. The next prime is 161498890103. The reversal of 161498889984 is 489988894161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4919577 + ... + 4952295.

Almost surely, 2^161498889984 is an apocalyptic number.

It is an amenable number.

161498889984 is an abundant number, since it is smaller than the sum of its proper divisors (268403693056).

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

161498889984 is an equidigital number, since it uses as much as digits as its factorization.

161498889984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39165 (or 39151 counting only the distinct ones).

The product of its digits is 286654464, while the sum is 75.

The spelling of 161498889984 in words is "one hundred sixty-one billion, four hundred ninety-eight million, eight hundred eighty-nine thousand, nine hundred eighty-four".