6513564899 has 2 divisors, whose sum is σ = 6513564900. Its totient is φ = 6513564898.

The previous prime is 6513564887. The next prime is 6513564979. The reversal of 6513564899 is 9984653156.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6513564899 is a prime.

It is not a weakly prime, because it can be changed into another prime (6513563899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3256782449 + 3256782450.

It is an arithmetic number, because the mean of its divisors is an integer number (3256782450).

Almost surely, 2^6513564899 is an apocalyptic number.

6513564899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6513564899 is an equidigital number, since it uses as much as digits as its factorization.

6513564899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 56.

The square root of 6513564899 is about 80706.6595703229. The cubic root of 6513564899 is about 1867.5529106343.

The spelling of 6513564899 in words is "six billion, five hundred thirteen million, five hundred sixty-four thousand, eight hundred ninety-nine".