161632855 has 8 divisors (see below), whose sum is σ = 205368912. Its totient is φ = 121699968.

The previous prime is 161632847. The next prime is 161632871. The reversal of 161632855 is 558236161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161632855 - 2³ = 161632847 is a prime.

It is a super-2 number, since 2×161632855² = 52250359630902050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950697 + ... + 950866.

It is an arithmetic number, because the mean of its divisors is an integer number (25671114).

Almost surely, 2^161632855 is an apocalyptic number.

161632855 is a deficient number, since it is larger than the sum of its proper divisors (43736057).

161632855 is a wasteful number, since it uses less digits than its factorization.

161632855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901585.

The product of its digits is 43200, while the sum is 37.

The square root of 161632855 is about 12713.4910626468. The cubic root of 161632855 is about 544.7240473765.

The spelling of 161632855 in words is "one hundred sixty-one million, six hundred thirty-two thousand, eight hundred fifty-five".