111797231616 has 672 divisors, whose sum is σ = 391581485568. Its totient is φ = 31213486080.

The previous prime is 111797231587. The next prime is 111797231639. The reversal of 111797231616 is 616132797111.

111797231616 is a `hidden beast` number, since 1 + 1 + 1 + 7 + 9 + 7 + 23 + 1 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (95256) is a multiple of the sum of its prime divisors (196).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 989355976 + ... + 989356088.

It is an arithmetic number, because the mean of its divisors is an integer number (582710544).

Almost surely, 2^111797231616 is an apocalyptic number.

111797231616 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 111797231616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195790742784).

111797231616 is an abundant number, since it is smaller than the sum of its proper divisors (279784253952).

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

111797231616 is an frugal number, since it uses more digits than its factorization.

111797231616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 196 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The spelling of 111797231616 in words is "one hundred eleven billion, seven hundred ninety-seven million, two hundred thirty-one thousand, six hundred sixteen".