117856465920 has 132 divisors (see below), whose sum is σ = 408369744900. Its totient is φ = 31428378624.

The previous prime is 117856465897. The next prime is 117856465927. The reversal of 117856465920 is 29564658711.

It is a happy number.

117856465920 is a `hidden beast` number, since 1 + 1 + 7 + 8 + 5 + 6 + 46 + 592 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54061830144 + 63794635776 = 232512^2 + 252576^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117856465927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1232745 + ... + 1324904.

Almost surely, 2^117856465920 is an apocalyptic number.

117856465920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117856465920 is an abundant number, since it is smaller than the sum of its proper divisors (290513278980).

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

117856465920 is a wasteful number, since it uses less digits than its factorization.

117856465920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557680 (or 2557659 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 117856465920 in words is "one hundred seventeen billion, eight hundred fifty-six million, four hundred sixty-five thousand, nine hundred twenty".