117563661 has 6 divisors (see below), whose sum is σ = 169814190. Its totient is φ = 78375768.

The previous prime is 117563657. The next prime is 117563669. The reversal of 117563661 is 166365711.

117563661 is a `hidden beast` number, since 1 + 17 + 5 + 636 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 46498761 = 8430^2 + 6819^2 .

It is not a de Polignac number, because 117563661 - 2² = 117563657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117563669) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6531306 + ... + 6531323.

It is an arithmetic number, because the mean of its divisors is an integer number (28302365).

Almost surely, 2^117563661 is an apocalyptic number.

It is an amenable number.

117563661 is a deficient number, since it is larger than the sum of its proper divisors (52250529).

117563661 is a wasteful number, since it uses less digits than its factorization.

117563661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062635 (or 13062632 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 117563661 is about 10842.6777596680. The cubic root of 117563661 is about 489.8814943184.

The spelling of 117563661 in words is "one hundred seventeen million, five hundred sixty-three thousand, six hundred sixty-one".