641515807799 has 2 divisors, whose sum is σ = 641515807800. Its totient is φ = 641515807798.

The previous prime is 641515807763. The next prime is 641515807903. The reversal of 641515807799 is 997708515146.

641515807799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641515807799 - 2²⁸ = 641247372343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641515837799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320757903899 + 320757903900.

It is an arithmetic number, because the mean of its divisors is an integer number (320757903900).

Almost surely, 2^641515807799 is an apocalyptic number.

641515807799 is a deficient number, since it is larger than the sum of its proper divisors (1).

641515807799 is an equidigital number, since it uses as much as digits as its factorization.

641515807799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19051200, while the sum is 62.

The spelling of 641515807799 in words is "six hundred forty-one billion, five hundred fifteen million, eight hundred seven thousand, seven hundred ninety-nine".