12604640621 has 8 divisors (see below), whose sum is σ = 12874909824. Its totient is φ = 12334458400.

The previous prime is 12604640593. The next prime is 12604640623.

12604640621 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 12604640621 - 2¹⁸ = 12604378477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12604640623) 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, 332201 + ... + 368193.

It is an arithmetic number, because the mean of its divisors is an integer number (1609363728).

Almost surely, 2^12604640621 is an apocalyptic number.

It is an amenable number.

12604640621 is a deficient number, since it is larger than the sum of its proper divisors (270269203).

12604640621 is an equidigital number, since it uses as much as digits as its factorization.

12604640621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43491.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 12604640621 in words is "twelve billion, six hundred four million, six hundred forty thousand, six hundred twenty-one".