16564636412111 has 8 divisors (see below), whose sum is σ = 18013054541040. Its totient is φ = 15168888033408.

The previous prime is 16564636412021. The next prime is 16564636412143. The reversal of 16564636412111 is 11121463646561.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16564636412111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564636412911) 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, 13167436901 + ... + 13167438158.

It is an arithmetic number, because the mean of its divisors is an integer number (2251631817630).

Almost surely, 2^{16564636412111} is an apocalyptic number.

16564636412111 is a deficient number, since it is larger than the sum of its proper divisors (1448418128929).

16564636412111 is a wasteful number, since it uses less digits than its factorization.

16564636412111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26334875113.

The product of its digits is 622080, while the sum is 47.

The spelling of 16564636412111 in words is "sixteen trillion, five hundred sixty-four billion, six hundred thirty-six million, four hundred twelve thousand, one hundred eleven".