2644989023 has 4 divisors (see below), whose sum is σ = 2657524728. Its totient is φ = 2632453320.

The previous prime is 2644988999. The next prime is 2644989041. The reversal of 2644989023 is 3209894462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2644989023 - 2²⁰ = 2643940447 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 (2644989073) 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 3 ways as a sum of consecutive naturals, for example, 6267536 + ... + 6267957.

It is an arithmetic number, because the mean of its divisors is an integer number (664381182).

Almost surely, 2^2644989023 is an apocalyptic number.

2644989023 is a deficient number, since it is larger than the sum of its proper divisors (12535705).

2644989023 is a wasteful number, since it uses less digits than its factorization.

2644989023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535704.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 2644989023 is about 51429.4567636097. The cubic root of 2644989023 is about 1382.9547107920.

The spelling of 2644989023 in words is "two billion, six hundred forty-four million, nine hundred eighty-nine thousand, twenty-three".