6511317401 has 2 divisors, whose sum is σ = 6511317402. Its totient is φ = 6511317400.

The previous prime is 6511317361. The next prime is 6511317419. The reversal of 6511317401 is 1047131156.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4795701001 + 1715616400 = 69251^2 + 41420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6511317401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6511314401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255658700 + 3255658701.

It is an arithmetic number, because the mean of its divisors is an integer number (3255658701).

Almost surely, 2^6511317401 is an apocalyptic number.

It is an amenable number.

6511317401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511317401 is an equidigital number, since it uses as much as digits as its factorization.

6511317401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 6511317401 is about 80692.7344994579. The cubic root of 6511317401 is about 1867.3380869369.

Adding to 6511317401 its reverse (1047131156), we get a palindrome (7558448557).

The spelling of 6511317401 in words is "six billion, five hundred eleven million, three hundred seventeen thousand, four hundred one".