85712256785 has 16 divisors (see below), whose sum is σ = 105773299200. Its totient is φ = 66650196096.

The previous prime is 85712256781. The next prime is 85712256823. The reversal of 85712256785 is 58765221758.

It is a cyclic number.

It is not a de Polignac number, because 85712256785 - 2² = 85712256781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85712256785.

It is not an unprimeable number, because it can be changed into a prime (85712256781) 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, 1606049 + ... + 1658558.

It is an arithmetic number, because the mean of its divisors is an integer number (6610831200).

Almost surely, 2^85712256785 is an apocalyptic number.

It is an amenable number.

85712256785 is a deficient number, since it is larger than the sum of its proper divisors (20061042415).

85712256785 is a wasteful number, since it uses less digits than its factorization.

85712256785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264760.

The product of its digits is 9408000, while the sum is 56.

The spelling of 85712256785 in words is "eighty-five billion, seven hundred twelve million, two hundred fifty-six thousand, seven hundred eighty-five".