855508063 has 2 divisors, whose sum is σ = 855508064. Its totient is φ = 855508062.

The previous prime is 855508021. The next prime is 855508081. The reversal of 855508063 is 360805558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855508063 - 2⁹ = 855507551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855508013) 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, 427754031 + 427754032.

It is an arithmetic number, because the mean of its divisors is an integer number (427754032).

Almost surely, 2^855508063 is an apocalyptic number.

855508063 is a deficient number, since it is larger than the sum of its proper divisors (1).

855508063 is an equidigital number, since it uses as much as digits as its factorization.

855508063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 855508063 is about 29249.0694381890. The cubic root of 855508063 is about 949.3099561481.

The spelling of 855508063 in words is "eight hundred fifty-five million, five hundred eight thousand, sixty-three".