2640613263 has 16 divisors (see below), whose sum is σ = 3696000000. Its totient is φ = 1674743040.

The previous prime is 2640613259. The next prime is 2640613271. The reversal of 2640613263 is 3623160462.

It is not a de Polignac number, because 2640613263 - 2² = 2640613259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640613363) 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, 235138 + ... + 246111.

It is an arithmetic number, because the mean of its divisors is an integer number (231000000).

Almost surely, 2^2640613263 is an apocalyptic number.

2640613263 is a deficient number, since it is larger than the sum of its proper divisors (1055386737).

2640613263 is a wasteful number, since it uses less digits than its factorization.

2640613263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481342.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 2640613263 is about 51386.8977756003. The cubic root of 2640613263 is about 1382.1916555672.

The spelling of 2640613263 in words is "two billion, six hundred forty million, six hundred thirteen thousand, two hundred sixty-three".