111688765650 has 432 divisors, whose sum is σ = 390945102912. Its totient is φ = 23205916800.

The previous prime is 111688765649. The next prime is 111688765687. The reversal of 111688765650 is 56567886111.

It is a happy number.

111688765650 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 8 + 8 + 76 + 565 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 10285624 + ... + 10296476.

It is an arithmetic number, because the mean of its divisors is an integer number (904965516).

Almost surely, 2^111688765650 is an apocalyptic number.

111688765650 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 111688765650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195472551456).

111688765650 is an abundant number, since it is smaller than the sum of its proper divisors (279256337262).

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

111688765650 is a wasteful number, since it uses less digits than its factorization.

111688765650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10909 (or 10881 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 111688765650 in words is "one hundred eleven billion, six hundred eighty-eight million, seven hundred sixty-five thousand, six hundred fifty".