111608333661 has 16 divisors (see below), whose sum is σ = 162345093120. Its totient is φ = 67639039920.

The previous prime is 111608333647. The next prime is 111608333689. The reversal of 111608333661 is 166333806111.

It is a happy number.

It is not a de Polignac number, because 111608333661 - 2¹³ = 111608325469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111608333611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530516 + ... + 1601778.

It is an arithmetic number, because the mean of its divisors is an integer number (10146568320).

Almost surely, 2^111608333661 is an apocalyptic number.

111608333661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111608333661 is a deficient number, since it is larger than the sum of its proper divisors (50736759459).

111608333661 is a wasteful number, since it uses less digits than its factorization.

111608333661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118736.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 111608333661 in words is "one hundred eleven billion, six hundred eight million, three hundred thirty-three thousand, six hundred sixty-one".