12680408621 has 4 divisors (see below), whose sum is σ = 12681812544. Its totient is φ = 12679004700.

The previous prime is 12680408603. The next prime is 12680408627.

It is a happy number.

12680408621 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12680408621 - 2⁶ = 12680408557 is a prime.

It is a super-2 number, since 2×12680408621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12680408627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688325 + ... + 706506.

It is an arithmetic number, because the mean of its divisors is an integer number (3170453136).

Almost surely, 2^12680408621 is an apocalyptic number.

It is an amenable number.

12680408621 is a deficient number, since it is larger than the sum of its proper divisors (1403923).

12680408621 is an equidigital number, since it uses as much as digits as its factorization.

12680408621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403922.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 12680408621 in words is "twelve billion, six hundred eighty million, four hundred eight thousand, six hundred twenty-one".