117811644869 has 16 divisors (see below), whose sum is σ = 125773959168. Its totient is φ = 109964719872.

The previous prime is 117811644859. The next prime is 117811644887. The reversal of 117811644869 is 968446118711.

It is a de Polignac number, because none of the positive numbers 2^k-117811644869 is a prime.

It is a super-2 number, since 2×117811644869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117811644859) 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, 6258179 + ... + 6276975.

It is an arithmetic number, because the mean of its divisors is an integer number (7860872448).

Almost surely, 2^117811644869 is an apocalyptic number.

It is an amenable number.

117811644869 is a deficient number, since it is larger than the sum of its proper divisors (7962314299).

117811644869 is a wasteful number, since it uses less digits than its factorization.

117811644869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21844.

The product of its digits is 2322432, while the sum is 56.

The spelling of 117811644869 in words is "one hundred seventeen billion, eight hundred eleven million, six hundred forty-four thousand, eight hundred sixty-nine".