117831940857 has 24 divisors (see below), whose sum is σ = 174658612128. Its totient is φ = 76504305600.

The previous prime is 117831940841. The next prime is 117831940861. The reversal of 117831940857 is 758049138711.

117831940857 is a `hidden beast` number, since 1 + 178 + 3 + 19 + 408 + 57 = 666.

It is not a de Polignac number, because 117831940857 - 2⁴ = 117831940841 is a prime.

It is a super-2 number, since 2×117831940857² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117831950857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68923 + ... + 490320.

It is an arithmetic number, because the mean of its divisors is an integer number (7277442172).

Almost surely, 2^117831940857 is an apocalyptic number.

It is an amenable number.

117831940857 is a deficient number, since it is larger than the sum of its proper divisors (56826671271).

117831940857 is a wasteful number, since it uses less digits than its factorization.

117831940857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559861 (or 559858 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 117831940857 in words is "one hundred seventeen billion, eight hundred thirty-one million, nine hundred forty thousand, eight hundred fifty-seven".