117557809818 has 16 divisors (see below), whose sum is σ = 238091767680. Its totient is φ = 38689911936.

The previous prime is 117557809813. The next prime is 117557809819. The reversal of 117557809818 is 818908755711.

It is not an unprimeable number, because it can be changed into a prime (117557809813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124005655 + ... + 124006602.

It is an arithmetic number, because the mean of its divisors is an integer number (14880735480).

Almost surely, 2^117557809818 is an apocalyptic number.

117557809818 is an abundant number, since it is smaller than the sum of its proper divisors (120533957862).

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

117557809818 is a wasteful number, since it uses less digits than its factorization.

117557809818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248012341.

The product of its (nonzero) digits is 5644800, while the sum is 60.

The spelling of 117557809818 in words is "one hundred seventeen billion, five hundred fifty-seven million, eight hundred nine thousand, eight hundred eighteen".