5721640399 has 2 divisors, whose sum is σ = 5721640400. Its totient is φ = 5721640398.

The previous prime is 5721640381. The next prime is 5721640409. The reversal of 5721640399 is 9930461275.

It is a happy number.

5721640399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5721640399 - 2⁵ = 5721640367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5721640349) 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 as a sum of consecutive naturals, namely, 2860820199 + 2860820200.

It is an arithmetic number, because the mean of its divisors is an integer number (2860820200).

Almost surely, 2^5721640399 is an apocalyptic number.

5721640399 is a deficient number, since it is larger than the sum of its proper divisors (1).

5721640399 is an equidigital number, since it uses as much as digits as its factorization.

5721640399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 5721640399 is about 75641.5256258095. The cubic root of 5721640399 is about 1788.5737522070.

The spelling of 5721640399 in words is "five billion, seven hundred twenty-one million, six hundred forty thousand, three hundred ninety-nine".