117188928387 has 16 divisors (see below), whose sum is σ = 173683416480. Its totient is φ = 78094367136.

The previous prime is 117188928379. The next prime is 117188928397. The reversal of 117188928387 is 783829881711.

117188928387 is a `hidden beast` number, since 1 + 171 + 8 + 89 + 2 + 8 + 387 = 666.

It is not a de Polignac number, because 117188928387 - 2³ = 117188928379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117188928397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809248 + ... + 943005.

It is an arithmetic number, because the mean of its divisors is an integer number (10855213530).

Almost surely, 2^117188928387 is an apocalyptic number.

117188928387 is a deficient number, since it is larger than the sum of its proper divisors (56494488093).

117188928387 is a wasteful number, since it uses less digits than its factorization.

117188928387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754739 (or 1754733 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 63.

The spelling of 117188928387 in words is "one hundred seventeen billion, one hundred eighty-eight million, nine hundred twenty-eight thousand, three hundred eighty-seven".