161055664 has 80 divisors (see below), whose sum is σ = 401688576. Its totient is φ = 60710400.

The previous prime is 161055659. The next prime is 161055673. The reversal of 161055664 is 466550161.

It is a happy number.

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, 36084 + ... + 40300.

Almost surely, 2^161055664 is an apocalyptic number.

161055664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161055664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200844288).

161055664 is an abundant number, since it is smaller than the sum of its proper divisors (240632912).

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

161055664 is a wasteful number, since it uses less digits than its factorization.

161055664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 161055664 is about 12690.7708197729. The cubic root of 161055664 is about 544.0748707504.

The spelling of 161055664 in words is "one hundred sixty-one million, fifty-five thousand, six hundred sixty-four".