6264138509 has 2 divisors, whose sum is σ = 6264138510. Its totient is φ = 6264138508.

The previous prime is 6264138469. The next prime is 6264138571. The reversal of 6264138509 is 9058314626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4533328900 + 1730809609 = 67330^2 + 41603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6264138509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6264138509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6264138589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3132069254 + 3132069255.

It is an arithmetic number, because the mean of its divisors is an integer number (3132069255).

Almost surely, 2^6264138509 is an apocalyptic number.

It is an amenable number.

6264138509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6264138509 is an equidigital number, since it uses as much as digits as its factorization.

6264138509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 6264138509 is about 79146.3107731497. The cubic root of 6264138509 is about 1843.4036822696.

The spelling of 6264138509 in words is "six billion, two hundred sixty-four million, one hundred thirty-eight thousand, five hundred nine".