117181938564 has 18 divisors (see below), whose sum is σ = 296209900350. Its totient is φ = 39060646176.

The previous prime is 117181938541. The next prime is 117181938593. The reversal of 117181938564 is 465839181711.

117181938564 is a `hidden beast` number, since 1 + 1 + 71 + 8 + 1 + 9 + 3 + 8 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 116685094464 + 496844100 = 341592^2 + 22290^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 117181938564.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1627526889 + ... + 1627526960.

It is an arithmetic number, because the mean of its divisors is an integer number (16456105575).

Almost surely, 2^117181938564 is an apocalyptic number.

It is an amenable number.

117181938564 is an abundant number, since it is smaller than the sum of its proper divisors (179027961786).

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

117181938564 is a wasteful number, since it uses less digits than its factorization.

117181938564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255053859 (or 3255053854 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 117181938564 in words is "one hundred seventeen billion, one hundred eighty-one million, nine hundred thirty-eight thousand, five hundred sixty-four".