111665323616 has 192 divisors, whose sum is σ = 290640752640. Its totient is φ = 40886108160.

The previous prime is 111665323579. The next prime is 111665323631. The reversal of 111665323616 is 616323566111.

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, 36147800 + ... + 36150888.

It is an arithmetic number, because the mean of its divisors is an integer number (1513753920).

Almost surely, 2^111665323616 is an apocalyptic number.

111665323616 is a gapful number since it is divisible by the number (16) 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 111665323616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145320376320).

111665323616 is an abundant number, since it is smaller than the sum of its proper divisors (178975429024).

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

111665323616 is a wasteful number, since it uses less digits than its factorization.

111665323616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 3989 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

Adding to 111665323616 its reverse (616323566111), we get a palindrome (727988889727).

The spelling of 111665323616 in words is "one hundred eleven billion, six hundred sixty-five million, three hundred twenty-three thousand, six hundred sixteen".