117285987896 has 128 divisors (see below), whose sum is σ = 277189516800. Its totient is φ = 45194872320.

The previous prime is 117285987887. The next prime is 117285987899. The reversal of 117285987896 is 698789582711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117285987899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57803810 + ... + 57805838.

It is an arithmetic number, because the mean of its divisors is an integer number (2165543100).

Almost surely, 2^117285987896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117285987896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138594758400).

117285987896 is an abundant number, since it is smaller than the sum of its proper divisors (159903528904).

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

117285987896 is a wasteful number, since it uses less digits than its factorization.

117285987896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 3033 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 71.

The spelling of 117285987896 in words is "one hundred seventeen billion, two hundred eighty-five million, nine hundred eighty-seven thousand, eight hundred ninety-six".