5640649259 has 6 divisors (see below), whose sum is σ = 6561571644. Its totient is φ = 4834842180.

The previous prime is 5640649219. The next prime is 5640649271. The reversal of 5640649259 is 9529460465.

It is a happy number.

5640649259 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-5640649259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5640649219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57557597 + ... + 57557694.

It is an arithmetic number, because the mean of its divisors is an integer number (1093595274).

Almost surely, 2^5640649259 is an apocalyptic number.

5640649259 is a deficient number, since it is larger than the sum of its proper divisors (920922385).

5640649259 is a wasteful number, since it uses less digits than its factorization.

5640649259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115115305 (or 115115298 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The square root of 5640649259 is about 75104.2559313385. The cubic root of 5640649259 is about 1780.0943916405.

The spelling of 5640649259 in words is "five billion, six hundred forty million, six hundred forty-nine thousand, two hundred fifty-nine".