6485363821 has 2 divisors, whose sum is σ = 6485363822. Its totient is φ = 6485363820.

The previous prime is 6485363809. The next prime is 6485363849. The reversal of 6485363821 is 1283635846.

6485363821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4357848196 + 2127515625 = 66014^2 + 46125^2 .

It is a cyclic number.

It is not a de Polignac number, because 6485363821 - 2⁵ = 6485363789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6485363891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3242681910 + 3242681911.

It is an arithmetic number, because the mean of its divisors is an integer number (3242681911).

Almost surely, 2^6485363821 is an apocalyptic number.

It is an amenable number.

6485363821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6485363821 is an equidigital number, since it uses as much as digits as its factorization.

6485363821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 46.

The square root of 6485363821 is about 80531.7565994931. The cubic root of 6485363821 is about 1864.8537641426.

The spelling of 6485363821 in words is "six billion, four hundred eighty-five million, three hundred sixty-three thousand, eight hundred twenty-one".