12646522564621 has 16 divisors (see below), whose sum is σ = 13802365969920. Its totient is φ = 11491706623680.

The previous prime is 12646522564619. The next prime is 12646522564631.

12646522564621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12646522564621 - 2¹ = 12646522564619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646522564631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502052695 + ... + 502077883.

It is an arithmetic number, because the mean of its divisors is an integer number (862647873120).

Almost surely, 2^{12646522564621} is an apocalyptic number.

12646522564621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12646522564621 is a deficient number, since it is larger than the sum of its proper divisors (1155843405299).

12646522564621 is a wasteful number, since it uses less digits than its factorization.

12646522564621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43764.

The product of its digits is 8294400, while the sum is 52.

The spelling of 12646522564621 in words is "twelve trillion, six hundred forty-six billion, five hundred twenty-two million, five hundred sixty-four thousand, six hundred twenty-one".