117861564 has 12 divisors (see below), whose sum is σ = 275010344. Its totient is φ = 39287184.

The previous prime is 117861563. The next prime is 117861619. The reversal of 117861564 is 465168711.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117861563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4910887 + ... + 4910910.

Almost surely, 2^117861564 is an apocalyptic number.

It is an amenable number.

117861564 is an abundant number, since it is smaller than the sum of its proper divisors (157148780).

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

117861564 is a wasteful number, since it uses less digits than its factorization.

117861564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821804 (or 9821802 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 117861564 is about 10856.4065878172. The cubic root of 117861564 is about 490.2949272673.

The spelling of 117861564 in words is "one hundred seventeen million, eight hundred sixty-one thousand, five hundred sixty-four".