161519445924 has 48 divisors (see below), whose sum is σ = 380473632000. Its totient is φ = 53326447776.

The previous prime is 161519445887. The next prime is 161519445931. The reversal of 161519445924 is 429544915161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9877347 + ... + 9893685.

It is an arithmetic number, because the mean of its divisors is an integer number (7926534000).

Almost surely, 2^161519445924 is an apocalyptic number.

It is an amenable number.

161519445924 is an abundant number, since it is smaller than the sum of its proper divisors (218954186076).

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

161519445924 is a wasteful number, since it uses less digits than its factorization.

161519445924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24152 (or 24150 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The spelling of 161519445924 in words is "one hundred sixty-one billion, five hundred nineteen million, four hundred forty-five thousand, nine hundred twenty-four".