6469437840991 has 2 divisors, whose sum is σ = 6469437840992. Its totient is φ = 6469437840990.

The previous prime is 6469437840907. The next prime is 6469437841021. The reversal of 6469437840991 is 1990487349646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6469437840991 - 2³¹ = 6467290357343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6469437840991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6469437840491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234718920495 + 3234718920496.

It is an arithmetic number, because the mean of its divisors is an integer number (3234718920496).

Almost surely, 2^{6469437840991} is an apocalyptic number.

6469437840991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6469437840991 is an equidigital number, since it uses as much as digits as its factorization.

6469437840991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 6469437840991 in words is "six trillion, four hundred sixty-nine billion, four hundred thirty-seven million, eight hundred forty thousand, nine hundred ninety-one".