117811640465 has 16 divisors (see below), whose sum is σ = 143316432000. Its totient is φ = 92958133632.

The previous prime is 117811640447. The next prime is 117811640489. The reversal of 117811640465 is 564046118711.

It is a cyclic number.

It is not a de Polignac number, because 117811640465 - 2¹⁰ = 117811639441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11621 + ... + 485549.

It is an arithmetic number, because the mean of its divisors is an integer number (8957277000).

Almost surely, 2^117811640465 is an apocalyptic number.

It is an amenable number.

117811640465 is a deficient number, since it is larger than the sum of its proper divisors (25504791535).

117811640465 is an equidigital number, since it uses as much as digits as its factorization.

117811640465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474616.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 117811640465 in words is "one hundred seventeen billion, eight hundred eleven million, six hundred forty thousand, four hundred sixty-five".