868591027456 has 72 divisors (see below), whose sum is σ = 1771248374280. Its totient is φ = 424956420096.

The previous prime is 868591027441. The next prime is 868591027457. The reversal of 868591027456 is 654720195868.

It can be written as a sum of positive squares in 4 ways, for example, as 310044057856 + 558546969600 = 556816^2 + 747360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 868591027394 and 868591027403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868591027457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4975050 + ... + 5146678.

It is an arithmetic number, because the mean of its divisors is an integer number (24600671865).

Almost surely, 2^868591027456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868591027456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885624187140).

868591027456 is an abundant number, since it is smaller than the sum of its proper divisors (902657346824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868591027456 is a wasteful number, since it uses less digits than its factorization.

868591027456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172071 (or 172057 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 868591027456 in words is "eight hundred sixty-eight billion, five hundred ninety-one million, twenty-seven thousand, four hundred fifty-six".