855257555 has 16 divisors (see below), whose sum is σ = 1058935680. Its totient is φ = 662782848.

The previous prime is 855257549. The next prime is 855257593. The reversal of 855257555 is 555752558.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855257555 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 509 + ... + 41361.

It is an arithmetic number, because the mean of its divisors is an integer number (66183480).

Almost surely, 2^855257555 is an apocalyptic number.

855257555 is a deficient number, since it is larger than the sum of its proper divisors (203678125).

855257555 is a wasteful number, since it uses less digits than its factorization.

855257555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40990.

The product of its digits is 1750000, while the sum is 47.

The square root of 855257555 is about 29244.7868003855. The cubic root of 855257555 is about 949.2172888143.

The spelling of 855257555 in words is "eight hundred fifty-five million, two hundred fifty-seven thousand, five hundred fifty-five".