8456321663 has 2 divisors, whose sum is σ = 8456321664. Its totient is φ = 8456321662.

The previous prime is 8456321623. The next prime is 8456321677. The reversal of 8456321663 is 3661236548.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8456321663 - 2¹² = 8456317567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8456321623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228160831 + 4228160832.

It is an arithmetic number, because the mean of its divisors is an integer number (4228160832).

Almost surely, 2^8456321663 is an apocalyptic number.

8456321663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8456321663 is an equidigital number, since it uses as much as digits as its factorization.

8456321663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 44.

The square root of 8456321663 is about 91958.2604391797. The cubic root of 8456321663 is about 2037.3258616803.

The spelling of 8456321663 in words is "eight billion, four hundred fifty-six million, three hundred twenty-one thousand, six hundred sixty-three".