868363582581 has 24 divisors (see below), whose sum is σ = 1377045999264. Its totient is φ = 522928841760.

The previous prime is 868363582571. The next prime is 868363582589. The reversal of 868363582581 is 185285363868.

It is not a de Polignac number, because 868363582581 - 2⁷ = 868363582453 is a prime.

It is a super-2 number, since 2×868363582581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868363582589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27918691 + ... + 27949776.

It is an arithmetic number, because the mean of its divisors is an integer number (57376916636).

Almost surely, 2^868363582581 is an apocalyptic number.

It is an amenable number.

868363582581 is a deficient number, since it is larger than the sum of its proper divisors (508682416683).

868363582581 is a wasteful number, since it uses less digits than its factorization.

868363582581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55868641 (or 55868638 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 63.

The spelling of 868363582581 in words is "eight hundred sixty-eight billion, three hundred sixty-three million, five hundred eighty-two thousand, five hundred eighty-one".