111857599661 has 8 divisors (see below), whose sum is σ = 118405800480. Its totient is φ = 105488801712.

The previous prime is 111857599649. The next prime is 111857599703. The reversal of 111857599661 is 166995758111.

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 111857599661 - 2⁶ = 111857599597 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 111857599661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111857599561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44849435 + ... + 44851928.

It is an arithmetic number, because the mean of its divisors is an integer number (14800725060).

Almost surely, 2^111857599661 is an apocalyptic number.

It is an amenable number.

111857599661 is a deficient number, since it is larger than the sum of its proper divisors (6548200819).

111857599661 is an equidigital number, since it uses as much as digits as its factorization.

111857599661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89701435.

The product of its digits is 4082400, while the sum is 59.

The spelling of 111857599661 in words is "one hundred eleven billion, eight hundred fifty-seven million, five hundred ninety-nine thousand, six hundred sixty-one".