6540442211 has 2 divisors, whose sum is σ = 6540442212. Its totient is φ = 6540442210.

The previous prime is 6540442189. The next prime is 6540442229. The reversal of 6540442211 is 1122440456.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540442211 is a prime.

It is not a weakly prime, because it can be changed into another prime (6540442231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270221105 + 3270221106.

It is an arithmetic number, because the mean of its divisors is an integer number (3270221106).

Almost surely, 2^6540442211 is an apocalyptic number.

6540442211 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540442211 is an equidigital number, since it uses as much as digits as its factorization.

6540442211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 6540442211 is about 80873.0005069677. Note that the first 3 decimals coincide. The cubic root of 6540442211 is about 1870.1181172590.

Adding to 6540442211 its reverse (1122440456), we get a palindrome (7662882667).

The spelling of 6540442211 in words is "six billion, five hundred forty million, four hundred forty-two thousand, two hundred eleven".