646259498057 has 2 divisors, whose sum is σ = 646259498058. Its totient is φ = 646259498056.

The previous prime is 646259498023. The next prime is 646259498083. The reversal of 646259498057 is 750894952646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567206303161 + 79053194896 = 753131^2 + 281164^2 .

It is a cyclic number.

It is not a de Polignac number, because 646259498057 - 2¹⁰ = 646259497033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646259497984 and 646259498002.

It is not a weakly prime, because it can be changed into another prime (646259491057) 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, 323129749028 + 323129749029.

It is an arithmetic number, because the mean of its divisors is an integer number (323129749029).

Almost surely, 2^646259498057 is an apocalyptic number.

It is an amenable number.

646259498057 is a deficient number, since it is larger than the sum of its proper divisors (1).

646259498057 is an equidigital number, since it uses as much as digits as its factorization.

646259498057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 65.

The spelling of 646259498057 in words is "six hundred forty-six billion, two hundred fifty-nine million, four hundred ninety-eight thousand, fifty-seven".