117012171506778 has 192 divisors, whose sum is σ = 289524011212800. Its totient is φ = 33958402727040.

The previous prime is 117012171506767. The next prime is 117012171506831. The reversal of 117012171506778 is 877605171210711.

117012171506778 is a `hidden beast` number, since 1 + 1 + 7 + 0 + 121 + 7 + 1 + 506 + 7 + 7 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32168476 + ... + 35620712.

It is an arithmetic number, because the mean of its divisors is an integer number (1507937558400).

Almost surely, 2^{117012171506778} is an apocalyptic number.

117012171506778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117012171506778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144762005606400).

117012171506778 is an abundant number, since it is smaller than the sum of its proper divisors (172511839706022).

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

117012171506778 is a wasteful number, since it uses less digits than its factorization.

117012171506778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452457 (or 3452454 counting only the distinct ones).

The product of its (nonzero) digits is 1152480, while the sum is 54.

The spelling of 117012171506778 in words is "one hundred seventeen trillion, twelve billion, one hundred seventy-one million, five hundred six thousand, seven hundred seventy-eight".