6505211211943 has 2 divisors, whose sum is σ = 6505211211944. Its totient is φ = 6505211211942.

The previous prime is 6505211211923. The next prime is 6505211212009. The reversal of 6505211211943 is 3491121125056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6505211211943 - 2³³ = 6496621277351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6505211211896 and 6505211211905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6505211211923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252605605971 + 3252605605972.

It is an arithmetic number, because the mean of its divisors is an integer number (3252605605972).

Almost surely, 2^{6505211211943} is an apocalyptic number.

6505211211943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6505211211943 is an equidigital number, since it uses as much as digits as its factorization.

6505211211943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

Adding to 6505211211943 its reverse (3491121125056), we get a palindrome (9996332336999).

The spelling of 6505211211943 in words is "six trillion, five hundred five billion, two hundred eleven million, two hundred eleven thousand, nine hundred forty-three".