161845512 has 16 divisors (see below), whose sum is σ = 404613840. Its totient is φ = 53948496.

The previous prime is 161845499. The next prime is 161845529. The reversal of 161845512 is 215548161.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371758 + ... + 3371805.

It is an arithmetic number, because the mean of its divisors is an integer number (25288365).

Almost surely, 2^161845512 is an apocalyptic number.

161845512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161845512 is an abundant number, since it is smaller than the sum of its proper divisors (242768328).

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

161845512 is a wasteful number, since it uses less digits than its factorization.

161845512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743572 (or 6743568 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 161845512 is about 12721.8517520053. The cubic root of 161845512 is about 544.9628367331.

The spelling of 161845512 in words is "one hundred sixty-one million, eight hundred forty-five thousand, five hundred twelve".