117188809788 has 12 divisors (see below), whose sum is σ = 273440556200. Its totient is φ = 39062936592.

The previous prime is 117188809781. The next prime is 117188809799. The reversal of 117188809788 is 887908881711.

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 (117188809781) 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, 4882867063 + ... + 4882867086.

Almost surely, 2^117188809788 is an apocalyptic number.

It is an amenable number.

117188809788 is an abundant number, since it is smaller than the sum of its proper divisors (156251746412).

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

117188809788 is a wasteful number, since it uses less digits than its factorization.

117188809788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765734156 (or 9765734154 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 66.

The spelling of 117188809788 in words is "one hundred seventeen billion, one hundred eighty-eight million, eight hundred nine thousand, seven hundred eighty-eight".