85836722643685 has 16 divisors (see below), whose sum is σ = 110928026257776. Its totient is φ = 63386792944128.

The previous prime is 85836722643631. The next prime is 85836722643769. The reversal of 85836722643685 is 58634622763858.

It can be written as a sum of positive squares in 8 ways, for example, as 9775683838881 + 76061038804804 = 3126609^2 + 8721298^2 .

It is a cyclic number.

It is not a de Polignac number, because 85836722643685 - 2¹³ = 85836722635493 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9763497 + ... + 16340113.

It is an arithmetic number, because the mean of its divisors is an integer number (6933001641111).

Almost surely, 2^{85836722643685} is an apocalyptic number.

It is an amenable number.

85836722643685 is a deficient number, since it is larger than the sum of its proper divisors (25091303614091).

85836722643685 is a wasteful number, since it uses less digits than its factorization.

85836722643685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6777432.

The product of its digits is 2786918400, while the sum is 73.

The spelling of 85836722643685 in words is "eighty-five trillion, eight hundred thirty-six billion, seven hundred twenty-two million, six hundred forty-three thousand, six hundred eighty-five".