111601915651 has 8 divisors (see below), whose sum is σ = 116292964320. Its totient is φ = 106967047488.

The previous prime is 111601915637. The next prime is 111601915679. The reversal of 111601915651 is 156519106111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111601915651 - 2²³ = 111593527043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111601915651.

It is not an unprimeable number, because it can be changed into a prime (111601915351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14041071 + ... + 14049016.

It is an arithmetic number, because the mean of its divisors is an integer number (14536620540).

Almost surely, 2^111601915651 is an apocalyptic number.

111601915651 is a deficient number, since it is larger than the sum of its proper divisors (4691048669).

111601915651 is a wasteful number, since it uses less digits than its factorization.

111601915651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28090253.

The product of its (nonzero) digits is 8100, while the sum is 37.

The spelling of 111601915651 in words is "one hundred eleven billion, six hundred one million, nine hundred fifteen thousand, six hundred fifty-one".