111644728320 has 352 divisors, whose sum is σ = 383338709568. Its totient is φ = 27632074752.

The previous prime is 111644728313. The next prime is 111644728411. The reversal of 111644728320 is 23827446111.

It is a super-2 number, since 2×111644728320² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19058832 + ... + 19064688.

Almost surely, 2^111644728320 is an apocalyptic number.

111644728320 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 111644728320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191669354784).

111644728320 is an abundant number, since it is smaller than the sum of its proper divisors (271693981248).

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

111644728320 is a wasteful number, since it uses less digits than its factorization.

111644728320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975 (or 5957 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 111644728320 in words is "one hundred eleven billion, six hundred forty-four million, seven hundred twenty-eight thousand, three hundred twenty".