2640243312 has 60 divisors (see below), whose sum is σ = 8444590960. Its totient is φ = 754354944.

The previous prime is 2640243311. The next prime is 2640243329. The reversal of 2640243312 is 2133420462.

2640243312 is a `hidden beast` number, since 2 + 640 + 2 + 4 + 3 + 3 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640243311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1308637 + ... + 1310652.

Almost surely, 2^2640243312 is an apocalyptic number.

It is an amenable number.

2640243312 is an abundant number, since it is smaller than the sum of its proper divisors (5804347648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640243312 is a wasteful number, since it uses less digits than its factorization.

2640243312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619310 (or 2619301 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 2640243312 is about 51383.2979867972. The cubic root of 2640243312 is about 1382.1271040135.

Adding to 2640243312 its reverse (2133420462), we get a palindrome (4773663774).

The spelling of 2640243312 in words is "two billion, six hundred forty million, two hundred forty-three thousand, three hundred twelve".