111664427647 has 4 divisors (see below), whose sum is σ = 111686770000. Its totient is φ = 111642085296.

The previous prime is 111664427591. The next prime is 111664427653. The reversal of 111664427647 is 746724466111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111664427647 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 111664427647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111664427687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11163678 + ... + 11173675.

It is an arithmetic number, because the mean of its divisors is an integer number (27921692500).

Almost surely, 2^111664427647 is an apocalyptic number.

111664427647 is a deficient number, since it is larger than the sum of its proper divisors (22342353).

111664427647 is an equidigital number, since it uses as much as digits as its factorization.

111664427647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22342352.

The product of its digits is 1354752, while the sum is 49.

The spelling of 111664427647 in words is "one hundred eleven billion, six hundred sixty-four million, four hundred twenty-seven thousand, six hundred forty-seven".