648825384439 has 2 divisors, whose sum is σ = 648825384440. Its totient is φ = 648825384438.

The previous prime is 648825384421. The next prime is 648825384443. The reversal of 648825384439 is 934483528846.

It is a happy number.

648825384439 is digitally balanced in base 2, 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 a de Polignac number, because none of the positive numbers 2^k-648825384439 is a prime.

It is a super-2 number, since 2×648825384439² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648825387439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324412692219 + 324412692220.

It is an arithmetic number, because the mean of its divisors is an integer number (324412692220).

Almost surely, 2^648825384439 is an apocalyptic number.

648825384439 is a deficient number, since it is larger than the sum of its proper divisors (1).

648825384439 is an equidigital number, since it uses as much as digits as its factorization.

648825384439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 159252480, while the sum is 64.

The spelling of 648825384439 in words is "six hundred forty-eight billion, eight hundred twenty-five million, three hundred eighty-four thousand, four hundred thirty-nine".