6468396491 has 2 divisors, whose sum is σ = 6468396492. Its totient is φ = 6468396490.

The previous prime is 6468396463. The next prime is 6468396503. The reversal of 6468396491 is 1946938646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6468396491 - 2⁶ = 6468396427 is a prime.

It is a super-2 number, since 2×6468396491² = 83680306329562226162, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6468396401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234198245 + 3234198246.

It is an arithmetic number, because the mean of its divisors is an integer number (3234198246).

Almost surely, 2^6468396491 is an apocalyptic number.

6468396491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6468396491 is an equidigital number, since it uses as much as digits as its factorization.

6468396491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 6468396491 is about 80426.3420217530. The cubic root of 6468396491 is about 1863.2260362121.

The spelling of 6468396491 in words is "six billion, four hundred sixty-eight million, three hundred ninety-six thousand, four hundred ninety-one".