117784567839 has 32 divisors (see below), whose sum is σ = 166155091200. Its totient is φ = 74011207680.

The previous prime is 117784567793. The next prime is 117784567853. The reversal of 117784567839 is 938765487711.

It is not a de Polignac number, because 117784567839 - 2²⁰ = 117783519263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117784567839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117784562839) 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, 25203007 + ... + 25207679.

It is an arithmetic number, because the mean of its divisors is an integer number (5192346600).

Almost surely, 2^117784567839 is an apocalyptic number.

117784567839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

117784567839 is a deficient number, since it is larger than the sum of its proper divisors (48370523361).

117784567839 is a wasteful number, since it uses less digits than its factorization.

117784567839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855.

The product of its digits is 71124480, while the sum is 66.

The spelling of 117784567839 in words is "one hundred seventeen billion, seven hundred eighty-four million, five hundred sixty-seven thousand, eight hundred thirty-nine".