855085785 has 16 divisors (see below), whose sum is σ = 1440144960. Its totient is φ = 432043200.

The previous prime is 855085783. The next prime is 855085787. The reversal of 855085785 is 587580558.

It is an interprime number because it is at equal distance from previous prime (855085783) and next prime (855085787).

It is not a de Polignac number, because 855085785 - 2¹ = 855085783 is a prime.

It is a super-3 number, since 3×855085785³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (855085783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1499866 + ... + 1500435.

It is an arithmetic number, because the mean of its divisors is an integer number (90009060).

Almost surely, 2^855085785 is an apocalyptic number.

It is an amenable number.

855085785 is a deficient number, since it is larger than the sum of its proper divisors (585059175).

855085785 is a wasteful number, since it uses less digits than its factorization.

855085785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000328.

The product of its (nonzero) digits is 2240000, while the sum is 51.

The square root of 855085785 is about 29241.8498901831. The cubic root of 855085785 is about 949.1537375992.

The spelling of 855085785 in words is "eight hundred fifty-five million, eighty-five thousand, seven hundred eighty-five".