12564441614261 has 8 divisors (see below), whose sum is σ = 12647768034048. Its totient is φ = 12481116750000.

The previous prime is 12564441614251. The next prime is 12564441614279. The reversal of 12564441614261 is 16241614446521.

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-12564441614261 is a prime.

It is a super-2 number, since 2×12564441614261² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12564441614251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19020011 + ... + 19669511.

It is an arithmetic number, because the mean of its divisors is an integer number (1580971004256).

Almost surely, 2^{12564441614261} is an apocalyptic number.

It is an amenable number.

12564441614261 is a deficient number, since it is larger than the sum of its proper divisors (83326419787).

12564441614261 is a wasteful number, since it uses less digits than its factorization.

12564441614261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777763.

The product of its digits is 1105920, while the sum is 47.

The spelling of 12564441614261 in words is "twelve trillion, five hundred sixty-four billion, four hundred forty-one million, six hundred fourteen thousand, two hundred sixty-one".