117929427885 has 24 divisors (see below), whose sum is σ = 208267824024. Its totient is φ = 61708982400.

The previous prime is 117929427877. The next prime is 117929427953. The reversal of 117929427885 is 588724929711.

117929427885 is a `hidden beast` number, since 1 + 1 + 79 + 294 + 278 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 41569500996 + 76359926889 = 203886^2 + 276333^2 .

It is not a de Polignac number, because 117929427885 - 2³ = 117929427877 is a prime.

It is a super-2 number, since 2×117929427885² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24720766 + ... + 24725535.

It is an arithmetic number, because the mean of its divisors is an integer number (8677826001).

Almost surely, 2^117929427885 is an apocalyptic number.

117929427885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117929427885 is a deficient number, since it is larger than the sum of its proper divisors (90338396139).

117929427885 is a wasteful number, since it uses less digits than its factorization.

117929427885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49446365 (or 49446362 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 63.

The spelling of 117929427885 in words is "one hundred seventeen billion, nine hundred twenty-nine million, four hundred twenty-seven thousand, eight hundred eighty-five".