16564635225215 has 96 divisors (see below), whose sum is σ = 25909835364864. Its totient is φ = 9871251989760.

The previous prime is 16564635225163. The next prime is 16564635225221. The reversal of 16564635225215 is 51252253646561.

16564635225215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16564635225215 - 2¹⁴ = 16564635208831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36343517 + ... + 36796473.

It is an arithmetic number, because the mean of its divisors is an integer number (269894118384).

Almost surely, 2^{16564635225215} is an apocalyptic number.

16564635225215 is a deficient number, since it is larger than the sum of its proper divisors (9345200139649).

16564635225215 is a wasteful number, since it uses less digits than its factorization.

16564635225215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453117 (or 453070 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 53.

The spelling of 16564635225215 in words is "sixteen trillion, five hundred sixty-four billion, six hundred thirty-five million, two hundred twenty-five thousand, two hundred fifteen".