5640256820 has 48 divisors (see below), whose sum is σ = 13165141248. Its totient is φ = 2012300160.

The previous prime is 5640256819. The next prime is 5640256829. The reversal of 5640256820 is 286520465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640256829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230204 + ... + 253523.

It is an arithmetic number, because the mean of its divisors is an integer number (274273776).

Almost surely, 2^5640256820 is an apocalyptic number.

It is an amenable number.

5640256820 is an abundant number, since it is smaller than the sum of its proper divisors (7524884428).

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

5640256820 is a wasteful number, since it uses less digits than its factorization.

5640256820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483800 (or 483798 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 5640256820 is about 75101.6432576545. The cubic root of 5640256820 is about 1780.0531082921.

The spelling of 5640256820 in words is "five billion, six hundred forty million, two hundred fifty-six thousand, eight hundred twenty".