161632512 has 162 divisors, whose sum is σ = 488140926. Its totient is φ = 51425280.

The previous prime is 161632507. The next prime is 161632553. The reversal of 161632512 is 215236161.

161632512 is a `hidden beast` number, since 1 + 616 + 32 + 5 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 141705216 + 19927296 = 11904^2 + 4464^2 .

It is a super-2 number, since 2×161632512² = 52250137870860288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2214108 + ... + 2214180.

Almost surely, 2^161632512 is an apocalyptic number.

161632512 is a gapful number since it is divisible by the number (12) 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 161632512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244070463).

161632512 is an abundant number, since it is smaller than the sum of its proper divisors (326508414).

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

161632512 is an equidigital number, since it uses as much as digits as its factorization.

161632512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 109 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161632512 is about 12713.4775730325. The cubic root of 161632512 is about 544.7236620578.

Adding to 161632512 its reverse (215236161), we get a palindrome (376868673).

The spelling of 161632512 in words is "one hundred sixty-one million, six hundred thirty-two thousand, five hundred twelve".