117986187690 has 144 divisors (see below), whose sum is σ = 358933880448. Its totient is φ = 26340842304.

The previous prime is 117986187673. The next prime is 117986187703. The reversal of 117986187690 is 96781689711.

117986187690 is a `hidden beast` number, since 1 + 1 + 7 + 9 + 8 + 618 + 7 + 6 + 9 + 0 = 666.

It is a super-2 number, since 2×117986187690² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 71 ways as a sum of consecutive naturals, for example, 1114227 + ... + 1215513.

It is an arithmetic number, because the mean of its divisors is an integer number (2492596392).

Almost surely, 2^117986187690 is an apocalyptic number.

117986187690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117986187690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179466940224).

117986187690 is an abundant number, since it is smaller than the sum of its proper divisors (240947692758).

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

117986187690 is a wasteful number, since it uses less digits than its factorization.

117986187690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101393 (or 101347 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 63.

The spelling of 117986187690 in words is "one hundred seventeen billion, nine hundred eighty-six million, one hundred eighty-seven thousand, six hundred ninety".