6840105511 has 2 divisors, whose sum is σ = 6840105512. Its totient is φ = 6840105510.

The previous prime is 6840105463. The next prime is 6840105521. The reversal of 6840105511 is 1155010486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6840105511 - 2²⁵ = 6806551079 is a prime.

It is a super-2 number, since 2×6840105511² = 93574086803225142242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840105521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420052755 + 3420052756.

It is an arithmetic number, because the mean of its divisors is an integer number (3420052756).

Almost surely, 2^6840105511 is an apocalyptic number.

6840105511 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840105511 is an equidigital number, since it uses as much as digits as its factorization.

6840105511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 6840105511 is about 82704.9303911200. The cubic root of 6840105511 is about 1898.2537520636.

Adding to 6840105511 its reverse (1155010486), we get a palindrome (7995115997).

The spelling of 6840105511 in words is "six billion, eight hundred forty million, one hundred five thousand, five hundred eleven".