12644155144621 has 64 divisors (see below), whose sum is σ = 17159373504000. Its totient is φ = 8996955586560.

The previous prime is 12644155144601. The next prime is 12644155144627.

12644155144621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12644155144621 - 2³⁵ = 12609795406253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644155144627) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228830005 + ... + 228885253.

It is an arithmetic number, because the mean of its divisors is an integer number (268115211000).

Almost surely, 2^{12644155144621} is an apocalyptic number.

12644155144621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12644155144621 is a deficient number, since it is larger than the sum of its proper divisors (4515218359379).

12644155144621 is a wasteful number, since it uses less digits than its factorization.

12644155144621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57734.

The product of its digits is 921600, while the sum is 46.

The spelling of 12644155144621 in words is "twelve trillion, six hundred forty-four billion, one hundred fifty-five million, one hundred forty-four thousand, six hundred twenty-one".