117256386858 has 64 divisors (see below), whose sum is σ = 266586163200. Its totient is φ = 34084635840.

The previous prime is 117256386853. The next prime is 117256386889. The reversal of 117256386858 is 858683652711.

It is a super-2 number, since 2×117256386858² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117256386853) 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, 421843 + ... + 642233.

It is an arithmetic number, because the mean of its divisors is an integer number (4165408800).

Almost surely, 2^117256386858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117256386858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133293081600).

117256386858 is an abundant number, since it is smaller than the sum of its proper divisors (149329776342).

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

117256386858 is a wasteful number, since it uses less digits than its factorization.

117256386858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220787.

The product of its digits is 19353600, while the sum is 60.

The spelling of 117256386858 in words is "one hundred seventeen billion, two hundred fifty-six million, three hundred eighty-six thousand, eight hundred fifty-eight".