16564641413212 has 6 divisors (see below), whose sum is σ = 28988122473128. Its totient is φ = 8282320706604.

The previous prime is 16564641413191. The next prime is 16564641413213. The reversal of 16564641413212 is 21231414646561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564641413213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2070580176648 + ... + 2070580176655.

Almost surely, 2^{16564641413212} is an apocalyptic number.

It is an amenable number.

16564641413212 is a deficient number, since it is larger than the sum of its proper divisors (12423481059916).

16564641413212 is a wasteful number, since it uses less digits than its factorization.

16564641413212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141160353307 (or 4141160353305 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The spelling of 16564641413212 in words is "sixteen trillion, five hundred sixty-four billion, six hundred forty-one million, four hundred thirteen thousand, two hundred twelve".