117717771836 has 24 divisors (see below), whose sum is σ = 235464499200. Its totient is φ = 50444268912.

The previous prime is 117717771827. The next prime is 117717771851. The reversal of 117717771836 is 638177717711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23036 + ... + 485763.

It is an arithmetic number, because the mean of its divisors is an integer number (9811020800).

Almost surely, 2^117717771836 is an apocalyptic number.

It is an amenable number.

117717771836 is an abundant number, since it is smaller than the sum of its proper divisors (117746727364).

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

117717771836 is a wasteful number, since it uses less digits than its factorization.

117717771836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517073 (or 517071 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 56.

The spelling of 117717771836 in words is "one hundred seventeen billion, seven hundred seventeen million, seven hundred seventy-one thousand, eight hundred thirty-six".