870643725433285 has 16 divisors (see below), whose sum is σ = 1051479642314736. Its totient is φ = 692057185763328.

The previous prime is 870643725433283. The next prime is 870643725433301. The reversal of 870643725433285 is 582334527346078.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 319847793035521 + 550795932397764 = 17884289^2 + 23469042^2 .

It is a cyclic number.

It is not a de Polignac number, because 870643725433285 - 2¹ = 870643725433283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 870643725433285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870643725433283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852819522 + ... + 853839811.

It is an arithmetic number, because the mean of its divisors is an integer number (65717477644671).

Almost surely, 2^{870643725433285} is an apocalyptic number.

It is an amenable number.

870643725433285 is a deficient number, since it is larger than the sum of its proper divisors (180835916881451).

870643725433285 is a wasteful number, since it uses less digits than its factorization.

870643725433285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706659992.

The product of its (nonzero) digits is 812851200, while the sum is 67.

The spelling of 870643725433285 in words is "eight hundred seventy trillion, six hundred forty-three billion, seven hundred twenty-five million, four hundred thirty-three thousand, two hundred eighty-five".