6425205491 has 2 divisors, whose sum is σ = 6425205492. Its totient is φ = 6425205490.

The previous prime is 6425205481. The next prime is 6425205533. The reversal of 6425205491 is 1945025246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6425205491 - 2¹⁴ = 6425189107 is a prime.

It is not a weakly prime, because it can be changed into another prime (6425205481) 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, 3212602745 + 3212602746.

It is an arithmetic number, because the mean of its divisors is an integer number (3212602746).

Almost surely, 2^6425205491 is an apocalyptic number.

6425205491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425205491 is an equidigital number, since it uses as much as digits as its factorization.

6425205491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 6425205491 is about 80157.3795167981. The cubic root of 6425205491 is about 1859.0697058050.

The spelling of 6425205491 in words is "six billion, four hundred twenty-five million, two hundred five thousand, four hundred ninety-one".