806178165255 has 40 divisors (see below), whose sum is σ = 1530157785552. Its totient is φ = 404669820672.

The previous prime is 806178165223. The next prime is 806178165283. The reversal of 806178165255 is 552561871608.

806178165255 is a `hidden beast` number, since 8 + 0 + 617 + 8 + 16 + 5 + 2 + 5 + 5 = 666.

It is not a de Polignac number, because 806178165255 - 2⁵ = 806178165223 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 39 ways as a sum of consecutive naturals, for example, 58539097 + ... + 58552866.

Almost surely, 2^806178165255 is an apocalyptic number.

806178165255 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

806178165255 is a deficient number, since it is larger than the sum of its proper divisors (723979620297).

806178165255 is a wasteful number, since it uses less digits than its factorization.

806178165255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117091997 (or 117091988 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 806178165255 in words is "eight hundred six billion, one hundred seventy-eight million, one hundred sixty-five thousand, two hundred fifty-five".