6398576641 has 2 divisors, whose sum is σ = 6398576642. Its totient is φ = 6398576640.

The previous prime is 6398576621. The next prime is 6398576689. The reversal of 6398576641 is 1466758936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4029710400 + 2368866241 = 63480^2 + 48671^2 .

It is a cyclic number.

It is not a de Polignac number, because 6398576641 - 2¹⁷ = 6398445569 is a prime.

It is not a weakly prime, because it can be changed into another prime (6398576621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199288320 + 3199288321.

It is an arithmetic number, because the mean of its divisors is an integer number (3199288321).

Almost surely, 2^6398576641 is an apocalyptic number.

It is an amenable number.

6398576641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6398576641 is an equidigital number, since it uses as much as digits as its factorization.

6398576641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The square root of 6398576641 is about 79991.1035115781. The cubic root of 6398576641 is about 1856.4978847561.

The spelling of 6398576641 in words is "six billion, three hundred ninety-eight million, five hundred seventy-six thousand, six hundred forty-one".