2644923009 has 8 divisors (see below), whose sum is σ = 3528832320. Its totient is φ = 1762147856.

The previous prime is 2644922999. The next prime is 2644923031. The reversal of 2644923009 is 9003294462.

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 2644923009 - 2⁴ = 2644922993 is a prime.

It is a super-2 number, since 2×2644923009² = 13991235447075228162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2644923089) 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, 278082 + ... + 287435.

It is an arithmetic number, because the mean of its divisors is an integer number (441104040).

Almost surely, 2^2644923009 is an apocalyptic number.

It is an amenable number.

2644923009 is a deficient number, since it is larger than the sum of its proper divisors (883909311).

2644923009 is a wasteful number, since it uses less digits than its factorization.

2644923009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567079.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 2644923009 is about 51428.8149678757. The cubic root of 2644923009 is about 1382.9432053716.

The spelling of 2644923009 in words is "two billion, six hundred forty-four million, nine hundred twenty-three thousand, nine".