161632355 has 4 divisors (see below), whose sum is σ = 193958832. Its totient is φ = 129305880.

The previous prime is 161632319. The next prime is 161632409. The reversal of 161632355 is 553236161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553236161 = 29 ⋅19077109.

It is not a de Polignac number, because 161632355 - 2²⁰ = 160583779 is a prime.

It is a super-2 number, since 2×161632355² = 52250036365692050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16163231 + ... + 16163240.

It is an arithmetic number, because the mean of its divisors is an integer number (48489708).

Almost surely, 2^161632355 is an apocalyptic number.

161632355 is a deficient number, since it is larger than the sum of its proper divisors (32326477).

161632355 is an equidigital number, since it uses as much as digits as its factorization.

161632355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32326476.

The product of its digits is 16200, while the sum is 32.

The square root of 161632355 is about 12713.4713984812. The cubic root of 161632355 is about 544.7234856873.

The spelling of 161632355 in words is "one hundred sixty-one million, six hundred thirty-two thousand, three hundred fifty-five".