117565308861 has 64 divisors (see below), whose sum is σ = 210726727680. Its totient is φ = 56305290240.

The previous prime is 117565308829. The next prime is 117565308877. The reversal of 117565308861 is 168803565711.

It is not a de Polignac number, because 117565308861 - 2⁵ = 117565308829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117565308061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2447685 + ... + 2495253.

It is an arithmetic number, because the mean of its divisors is an integer number (3292605120).

Almost surely, 2^117565308861 is an apocalyptic number.

117565308861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117565308861 is a deficient number, since it is larger than the sum of its proper divisors (93161418819).

117565308861 is a wasteful number, since it uses less digits than its factorization.

117565308861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48426.

The product of its (nonzero) digits is 1209600, while the sum is 51.

It can be divided in two parts, 117565 and 308861, that added together give a triangular number (426426 = T₉₂₃).

The spelling of 117565308861 in words is "one hundred seventeen billion, five hundred sixty-five million, three hundred eight thousand, eight hundred sixty-one".