2644660418401 has 4 divisors (see below), whose sum is σ = 2644664478912. Its totient is φ = 2644656357892.

The previous prime is 2644660418371. The next prime is 2644660418417. The reversal of 2644660418401 is 1048140664462.

2644660418401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2644660418401 - 2¹³ = 2644660410209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644660418201) 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, 808021 + ... + 2437666.

It is an arithmetic number, because the mean of its divisors is an integer number (661166119728).

Almost surely, 2^{2644660418401} is an apocalyptic number.

It is an amenable number.

2644660418401 is a deficient number, since it is larger than the sum of its proper divisors (4060511).

2644660418401 is an equidigital number, since it uses as much as digits as its factorization.

2644660418401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060510.

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 2644660418401 in words is "two trillion, six hundred forty-four billion, six hundred sixty million, four hundred eighteen thousand, four hundred one".