161634276 has 36 divisors (see below), whose sum is σ = 415506000. Its totient is φ = 52964208.

The previous prime is 161634257. The next prime is 161634287. The reversal of 161634276 is 672436161.

It is a happy number.

161634276 is a `hidden beast` number, since 1 + 616 + 34 + 2 + 7 + 6 = 666.

161634276 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161634276² = 52251278356088352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

161634276 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 161634276.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35926 + ... + 40173.

Almost surely, 2^161634276 is an apocalyptic number.

It is an amenable number.

161634276 is an abundant number, since it is smaller than the sum of its proper divisors (253871724).

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

161634276 is a wasteful number, since it uses less digits than its factorization.

161634276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76168 (or 76163 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 161634276 is about 12713.5469480393. The cubic root of 161634276 is about 544.7256436910.

The spelling of 161634276 in words is "one hundred sixty-one million, six hundred thirty-four thousand, two hundred seventy-six".