117678137786946 has 384 divisors, whose sum is σ = 294041208015360. Its totient is φ = 33695817523200.

The previous prime is 117678137786669. The next prime is 117678137786977. The reversal of 117678137786946 is 649687731876711.

117678137786946 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 7 + 81 + 377 + 86 + 94 + 6 = 666.

It is a super-2 number, since 2×117678137786946² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13583989411 + ... + 13583998073.

It is an arithmetic number, because the mean of its divisors is an integer number (765732312540).

Almost surely, 2^{117678137786946} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117678137786946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147020604007680).

117678137786946 is an abundant number, since it is smaller than the sum of its proper divisors (176363070228414).

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

117678137786946 is a wasteful number, since it uses less digits than its factorization.

117678137786946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162 (or 9159 counting only the distinct ones).

The product of its digits is 3584673792, while the sum is 81.

The spelling of 117678137786946 in words is "one hundred seventeen trillion, six hundred seventy-eight billion, one hundred thirty-seven million, seven hundred eighty-six thousand, nine hundred forty-six".