161145964 has 24 divisors (see below), whose sum is σ = 322572320. Its totient is φ = 69002496.

The previous prime is 161145961. The next prime is 161145991. The reversal of 161145964 is 469541161.

161145964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161145961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48484 + ... + 51700.

Almost surely, 2^161145964 is an apocalyptic number.

161145964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161145964 is an abundant number, since it is smaller than the sum of its proper divisors (161426356).

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

161145964 is a wasteful number, since it uses less digits than its factorization.

161145964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017 (or 5015 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 161145964 is about 12694.3280247518. The cubic root of 161145964 is about 544.1765349421.

The spelling of 161145964 in words is "one hundred sixty-one million, one hundred forty-five thousand, nine hundred sixty-four".