6540442313 has 2 divisors, whose sum is σ = 6540442314. Its totient is φ = 6540442312.

The previous prime is 6540442273. The next prime is 6540442331. The reversal of 6540442313 is 3132440456.

Together with next prime (6540442331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6182362384 + 358079929 = 78628^2 + 18923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540442313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6540442313.

It is not a weakly prime, because it can be changed into another prime (6540442343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270221156 + 3270221157.

It is an arithmetic number, because the mean of its divisors is an integer number (3270221157).

Almost surely, 2^6540442313 is an apocalyptic number.

It is an amenable number.

6540442313 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540442313 is an equidigital number, since it uses as much as digits as its factorization.

6540442313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 6540442313 is about 80873.0011375861. The cubic root of 6540442313 is about 1870.1181269807.

Adding to 6540442313 its reverse (3132440456), we get a palindrome (9672882769).

The spelling of 6540442313 in words is "six billion, five hundred forty million, four hundred forty-two thousand, three hundred thirteen".