6840034221511 has 2 divisors, whose sum is σ = 6840034221512. Its totient is φ = 6840034221510.

The previous prime is 6840034221491. The next prime is 6840034221529. The reversal of 6840034221511 is 1151224300486.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840034221511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840034221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420017110755 + 3420017110756.

It is an arithmetic number, because the mean of its divisors is an integer number (3420017110756).

Almost surely, 2^{6840034221511} is an apocalyptic number.

6840034221511 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840034221511 is an equidigital number, since it uses as much as digits as its factorization.

6840034221511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

Adding to 6840034221511 its reverse (1151224300486), we get a palindrome (7991258521997).

The spelling of 6840034221511 in words is "six trillion, eight hundred forty billion, thirty-four million, two hundred twenty-one thousand, five hundred eleven".