117887957892 has 18 divisors (see below), whose sum is σ = 297994560318. Its totient is φ = 39295985952.

The previous prime is 117887957867. The next prime is 117887957923. The reversal of 117887957892 is 298759788711.

It can be written as a sum of positive squares in only one way, i.e., 84137124096 + 33750833796 = 290064^2 + 183714^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 117887957892.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1637332713 + ... + 1637332784.

It is an arithmetic number, because the mean of its divisors is an integer number (16555253351).

Almost surely, 2^117887957892 is an apocalyptic number.

117887957892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

117887957892 is an abundant number, since it is smaller than the sum of its proper divisors (180106602426).

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

117887957892 is a wasteful number, since it uses less digits than its factorization.

117887957892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274665507 (or 3274665502 counting only the distinct ones).

The product of its digits is 142248960, while the sum is 72.

The spelling of 117887957892 in words is "one hundred seventeen billion, eight hundred eighty-seven million, nine hundred fifty-seven thousand, eight hundred ninety-two".