855464563 has 2 divisors, whose sum is σ = 855464564. Its totient is φ = 855464562.

The previous prime is 855464557. The next prime is 855464567. The reversal of 855464563 is 365464558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855464563 is a prime.

It is not a weakly prime, because it can be changed into another prime (855464567) 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, 427732281 + 427732282.

It is an arithmetic number, because the mean of its divisors is an integer number (427732282).

Almost surely, 2^855464563 is an apocalyptic number.

855464563 is a deficient number, since it is larger than the sum of its proper divisors (1).

855464563 is an equidigital number, since it uses as much as digits as its factorization.

855464563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728000, while the sum is 46.

The square root of 855464563 is about 29248.3258153351. The cubic root of 855464563 is about 949.2938660278.

It can be divided in two parts, 85546 and 4563, that added together give a palindrome (90109).

The spelling of 855464563 in words is "eight hundred fifty-five million, four hundred sixty-four thousand, five hundred sixty-three".