111643238600 has 96 divisors (see below), whose sum is σ = 267089144040. Its totient is φ = 43380480000.

The previous prime is 111643238591. The next prime is 111643238657. The reversal of 111643238600 is 6832346111.

It can be written as a sum of positive squares in 12 ways, for example, as 35856452164 + 75786786436 = 189358^2 + 275294^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1018460 + ... + 1122740.

Almost surely, 2^111643238600 is an apocalyptic number.

111643238600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111643238600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133544572020).

111643238600 is an abundant number, since it is smaller than the sum of its proper divisors (155445905440).

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

111643238600 is a wasteful number, since it uses less digits than its factorization.

111643238600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104451 (or 104442 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 111643238600 in words is "one hundred eleven billion, six hundred forty-three million, two hundred thirty-eight thousand, six hundred".