111993899278950 has 1152 divisors, whose sum is σ = 348145537259520. Its totient is φ = 25754068454400.

The previous prime is 111993899278939. The next prime is 111993899278997. The reversal of 111993899278950 is 59872998399111.

It is a happy number.

111993899278950 is a `hidden beast` number, since 1 + 1 + 1 + 99 + 389 + 9 + 27 + 89 + 50 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 111993899278950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 364800974697 + ... + 364800975003.

It is an arithmetic number, because the mean of its divisors is an integer number (302209667760).

Almost surely, 2^{111993899278950} is an apocalyptic number.

111993899278950 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 111993899278950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174072768629760).

111993899278950 is an abundant number, since it is smaller than the sum of its proper divisors (236151637980570).

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

111993899278950 is a wasteful number, since it uses less digits than its factorization.

111993899278950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 793618560, while the sum is 81.

The spelling of 111993899278950 in words is "one hundred eleven trillion, nine hundred ninety-three billion, eight hundred ninety-nine million, two hundred seventy-eight thousand, nine hundred fifty".