2644259979 has 16 divisors (see below), whose sum is σ = 3641508864. Its totient is φ = 1704991200.

The previous prime is 2644259957. The next prime is 2644259993. The reversal of 2644259979 is 9799524462.

2644259979 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2644259979 - 2⁷ = 2644259851 is a prime.

It is a super-2 number, since 2×2644259979² = 13984221673082160882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2644259999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176284 + ... + 190694.

It is an arithmetic number, because the mean of its divisors is an integer number (227594304).

Almost surely, 2^2644259979 is an apocalyptic number.

2644259979 is a deficient number, since it is larger than the sum of its proper divisors (997248885).

2644259979 is a wasteful number, since it uses less digits than its factorization.

2644259979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16418.

The product of its digits is 9797760, while the sum is 57.

The square root of 2644259979 is about 51422.3684693733. The cubic root of 2644259979 is about 1382.8276368579.

The spelling of 2644259979 in words is "two billion, six hundred forty-four million, two hundred fifty-nine thousand, nine hundred seventy-nine".