5811781287312 has 960 divisors, whose sum is σ = 23421900902400. Its totient is φ = 1295155630080.

The previous prime is 5811781287253. The next prime is 5811781287343. The reversal of 5811781287312 is 2137821871185.

5811781287312 is a `hidden beast` number, since 5 + 81 + 178 + 1 + 2 + 87 + 312 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 145132989 + ... + 145173027.

It is an arithmetic number, because the mean of its divisors is an integer number (24397813440).

Almost surely, 2^{5811781287312} is an apocalyptic number.

5811781287312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5811781287312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11710950451200).

5811781287312 is an abundant number, since it is smaller than the sum of its proper divisors (17610119615088).

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

5811781287312 is a wasteful number, since it uses less digits than its factorization.

5811781287312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40156 (or 40147 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 54.

The spelling of 5811781287312 in words is "five trillion, eight hundred eleven billion, seven hundred eighty-one million, two hundred eighty-seven thousand, three hundred twelve".