855807172 has 24 divisors (see below), whose sum is σ = 1636582752. Its totient is φ = 388344000.

The previous prime is 855807167. The next prime is 855807181. The reversal of 855807172 is 271708558.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10263 + ... + 42625.

It is an arithmetic number, because the mean of its divisors is an integer number (68190948).

Almost surely, 2^855807172 is an apocalyptic number.

It is an amenable number.

855807172 is a deficient number, since it is larger than the sum of its proper divisors (780775580).

855807172 is a wasteful number, since it uses less digits than its factorization.

855807172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32979 (or 32977 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 855807172 is about 29254.1821283727. The cubic root of 855807172 is about 949.4205781588.

The spelling of 855807172 in words is "eight hundred fifty-five million, eight hundred seven thousand, one hundred seventy-two".