6464903639 has 2 divisors, whose sum is σ = 6464903640. Its totient is φ = 6464903638.

The previous prime is 6464903629. The next prime is 6464903693. The reversal of 6464903639 is 9363094646.

It is a happy number.

Together with next prime (6464903693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6464903639 - 2⁸ = 6464903383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6464903629) 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, 3232451819 + 3232451820.

It is an arithmetic number, because the mean of its divisors is an integer number (3232451820).

Almost surely, 2^6464903639 is an apocalyptic number.

6464903639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464903639 is an equidigital number, since it uses as much as digits as its factorization.

6464903639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The square root of 6464903639 is about 80404.6244876500. The cubic root of 6464903639 is about 1862.8906030252.

The spelling of 6464903639 in words is "six billion, four hundred sixty-four million, nine hundred three thousand, six hundred thirty-nine".