199678115955888 has 80 divisors (see below), whose sum is σ = 573228146988000. Its totient is φ = 66550313998080.

The previous prime is 199678115955839. The next prime is 199678115955907. The reversal of 199678115955888 is 888559511876991.

199678115955888 is a `hidden beast` number, since 1 + 9 + 9 + 6 + 7 + 8 + 1 + 1 + 595 + 5 + 8 + 8 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 199678115955798 and 199678115955807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28272903 + ... + 34622438.

It is an arithmetic number, because the mean of its divisors is an integer number (7165351837350).

Almost surely, 2^{199678115955888} is an apocalyptic number.

199678115955888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199678115955888 is an abundant number, since it is smaller than the sum of its proper divisors (373550031032112).

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

199678115955888 is a wasteful number, since it uses less digits than its factorization.

199678115955888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62902707 (or 62902695 counting only the distinct ones).

The product of its digits is 15676416000, while the sum is 90.

The spelling of 199678115955888 in words is "one hundred ninety-nine trillion, six hundred seventy-eight billion, one hundred fifteen million, nine hundred fifty-five thousand, eight hundred eighty-eight".