12653340621 has 16 divisors (see below), whose sum is σ = 17079781824. Its totient is φ = 8331294464.

The previous prime is 12653340599. The next prime is 12653340671. The reversal of 12653340621 is 12604335621.

It is a cyclic number.

It is not a de Polignac number, because 12653340621 - 2⁹ = 12653340109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12653340671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074055 + ... + 1085771.

It is an arithmetic number, because the mean of its divisors is an integer number (1067486364).

Almost surely, 2^12653340621 is an apocalyptic number.

It is an amenable number.

12653340621 is a deficient number, since it is larger than the sum of its proper divisors (4426441203).

12653340621 is a wasteful number, since it uses less digits than its factorization.

12653340621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16140.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 12653340621 in words is "twelve billion, six hundred fifty-three million, three hundred forty thousand, six hundred twenty-one".