2640313268 has 6 divisors (see below), whose sum is σ = 4620548226. Its totient is φ = 1320156632.

The previous prime is 2640313177. The next prime is 2640313289. The reversal of 2640313268 is 8623130462.

It can be written as a sum of positive squares in only one way, i.e., 1920893584 + 719419684 = 43828^2 + 26822^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330039155 + ... + 330039162.

It is an arithmetic number, because the mean of its divisors is an integer number (770091371).

Almost surely, 2^2640313268 is an apocalyptic number.

It is an amenable number.

2640313268 is a deficient number, since it is larger than the sum of its proper divisors (1980234958).

2640313268 is a wasteful number, since it uses less digits than its factorization.

2640313268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660078321 (or 660078319 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 2640313268 is about 51383.9787093214. The cubic root of 2640313268 is about 1382.1393108720.

The spelling of 2640313268 in words is "two billion, six hundred forty million, three hundred thirteen thousand, two hundred sixty-eight".