646425260053 has 2 divisors, whose sum is σ = 646425260054. Its totient is φ = 646425260052.

The previous prime is 646425260027. The next prime is 646425260111. The reversal of 646425260053 is 350062524646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579270165604 + 67155094449 = 761098^2 + 259143^2 .

It is a cyclic number.

It is not a de Polignac number, because 646425260053 - 2²⁹ = 645888389141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646425259991 and 646425260009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646425260023) 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, 323212630026 + 323212630027.

It is an arithmetic number, because the mean of its divisors is an integer number (323212630027).

Almost surely, 2^646425260053 is an apocalyptic number.

It is an amenable number.

646425260053 is a deficient number, since it is larger than the sum of its proper divisors (1).

646425260053 is an equidigital number, since it uses as much as digits as its factorization.

646425260053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 646425260053 its reverse (350062524646), we get a palindrome (996487784699).

The spelling of 646425260053 in words is "six hundred forty-six billion, four hundred twenty-five million, two hundred sixty thousand, fifty-three".