857045623285 has 4 divisors (see below), whose sum is σ = 1028454747948. Its totient is φ = 685636498624.

The previous prime is 857045623283. The next prime is 857045623297. The reversal of 857045623285 is 582326540758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 563374839889 + 293670783396 = 750583^2 + 541914^2 .

It is a cyclic number.

It is not a de Polignac number, because 857045623285 - 2¹ = 857045623283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857045623283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85704562324 + ... + 85704562333.

It is an arithmetic number, because the mean of its divisors is an integer number (257113686987).

Almost surely, 2^857045623285 is an apocalyptic number.

It is an amenable number.

857045623285 is a deficient number, since it is larger than the sum of its proper divisors (171409124663).

857045623285 is a wasteful number, since it uses less digits than its factorization.

857045623285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171409124662.

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 857045623285 in words is "eight hundred fifty-seven billion, forty-five million, six hundred twenty-three thousand, two hundred eighty-five".