6513564979 has 2 divisors, whose sum is σ = 6513564980. Its totient is φ = 6513564978.

The previous prime is 6513564899. The next prime is 6513564991. The reversal of 6513564979 is 9794653156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6513564979 - 2⁷ = 6513564851 is a prime.

It is not a weakly prime, because it can be changed into another prime (6513561979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3256782489 + 3256782490.

It is an arithmetic number, because the mean of its divisors is an integer number (3256782490).

Almost surely, 2^6513564979 is an apocalyptic number.

6513564979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6513564979 is an equidigital number, since it uses as much as digits as its factorization.

6513564979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 55.

The square root of 6513564979 is about 80706.6600659450. The cubic root of 6513564979 is about 1867.5529182801.

The spelling of 6513564979 in words is "six billion, five hundred thirteen million, five hundred sixty-four thousand, nine hundred seventy-nine".