12655455621 has 8 divisors (see below), whose sum is σ = 16880231424. Its totient is φ = 8433825120.

The previous prime is 12655455613. The next prime is 12655455629.

12655455621 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (12655455613) and next prime (12655455629).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12655455621 - 2³ = 12655455613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655455629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776920 + ... + 793041.

It is an arithmetic number, because the mean of its divisors is an integer number (2110028928).

Almost surely, 2^12655455621 is an apocalyptic number.

It is an amenable number.

12655455621 is a deficient number, since it is larger than the sum of its proper divisors (4224775803).

12655455621 is a wasteful number, since it uses less digits than its factorization.

12655455621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572651.

The product of its digits is 360000, while the sum is 42.

The spelling of 12655455621 in words is "twelve billion, six hundred fifty-five million, four hundred fifty-five thousand, six hundred twenty-one".