855172765 has 8 divisors (see below), whose sum is σ = 1032353280. Its totient is φ = 680040912.

The previous prime is 855172763. The next prime is 855172781. The reversal of 855172765 is 567271558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855172765 - 2¹ = 855172763 is a prime.

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, 511245 + ... + 512914.

It is an arithmetic number, because the mean of its divisors is an integer number (129044160).

Almost surely, 2^855172765 is an apocalyptic number.

It is an amenable number.

855172765 is a deficient number, since it is larger than the sum of its proper divisors (177180515).

855172765 is a wasteful number, since it uses less digits than its factorization.

855172765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024331.

The product of its digits is 588000, while the sum is 46.

The square root of 855172765 is about 29243.3371043730. The cubic root of 855172765 is about 949.1859193968.

The spelling of 855172765 in words is "eight hundred fifty-five million, one hundred seventy-two thousand, seven hundred sixty-five".