161634411 has 12 divisors (see below), whose sum is σ = 236761200. Its totient is φ = 106238160.

The previous prime is 161634401. The next prime is 161634443. The reversal of 161634411 is 114436161.

161634411 is a `hidden beast` number, since 1 + 616 + 3 + 4 + 41 + 1 = 666.

It is not a de Polignac number, because 161634411 - 2⁵ = 161634379 is a prime.

It is a super-2 number, since 2×161634411² = 52251365638633842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161634401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 125836 + ... + 127113.

It is an arithmetic number, because the mean of its divisors is an integer number (19730100).

Almost surely, 2^161634411 is an apocalyptic number.

161634411 is a deficient number, since it is larger than the sum of its proper divisors (75126789).

161634411 is a wasteful number, since it uses less digits than its factorization.

161634411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253026 (or 253023 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 161634411 is about 12713.5522573355. The cubic root of 161634411 is about 544.7257953460.

The spelling of 161634411 in words is "one hundred sixty-one million, six hundred thirty-four thousand, four hundred eleven".