6806915513 has 2 divisors, whose sum is σ = 6806915514. Its totient is φ = 6806915512.

The previous prime is 6806915461. The next prime is 6806915543. The reversal of 6806915513 is 3155196086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4013475904 + 2793439609 = 63352^2 + 52853^2 .

It is a cyclic number.

It is not a de Polignac number, because 6806915513 - 2⁶ = 6806915449 is a prime.

It is a super-2 number, since 2×6806915513² = 92668197602240106338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6806915543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403457756 + 3403457757.

It is an arithmetic number, because the mean of its divisors is an integer number (3403457757).

Almost surely, 2^6806915513 is an apocalyptic number.

It is an amenable number.

6806915513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6806915513 is an equidigital number, since it uses as much as digits as its factorization.

6806915513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 6806915513 is about 82504.0333135296. The cubic root of 6806915513 is about 1895.1784965634.

The spelling of 6806915513 in words is "six billion, eight hundred six million, nine hundred fifteen thousand, five hundred thirteen".