855172766 has 16 divisors (see below), whose sum is σ = 1468733280. Its totient is φ = 365821920.

The previous prime is 855172763. The next prime is 855172781. The reversal of 855172766 is 667271558.

It is a self number, because there is not a number n which added to its sum of digits gives 855172766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855172763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48881 + ... + 64028.

It is an arithmetic number, because the mean of its divisors is an integer number (91795830).

Almost surely, 2^855172766 is an apocalyptic number.

855172766 is a deficient number, since it is larger than the sum of its proper divisors (613560514).

855172766 is a wasteful number, since it uses less digits than its factorization.

855172766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113459.

The product of its digits is 705600, while the sum is 47.

The square root of 855172766 is about 29243.3371214709. The cubic root of 855172766 is about 949.1859197668.

The spelling of 855172766 in words is "eight hundred fifty-five million, one hundred seventy-two thousand, seven hundred sixty-six".