6845650565491 has 2 divisors, whose sum is σ = 6845650565492. Its totient is φ = 6845650565490.

The previous prime is 6845650565471. The next prime is 6845650565581. The reversal of 6845650565491 is 1945650565486.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6845650565491 - 2¹⁵ = 6845650532723 is a prime.

It is not a weakly prime, because it can be changed into another prime (6845650565471) 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, 3422825282745 + 3422825282746.

It is an arithmetic number, because the mean of its divisors is an integer number (3422825282746).

Almost surely, 2^{6845650565491} is an apocalyptic number.

6845650565491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6845650565491 is an equidigital number, since it uses as much as digits as its factorization.

6845650565491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520000, while the sum is 64.

The spelling of 6845650565491 in words is "six trillion, eight hundred forty-five billion, six hundred fifty million, five hundred sixty-five thousand, four hundred ninety-one".