581439503812440 has 768 divisors, whose sum is σ = 2229243544120320. Its totient is φ = 118702090690560.

The previous prime is 581439503812429. The next prime is 581439503812457. The reversal of 581439503812440 is 44218305934185.

It is a happy number.

It is a congruent number.

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, 950400327 + ... + 951011913.

It is an arithmetic number, because the mean of its divisors is an integer number (2902660864740).

Almost surely, 2^{581439503812440} 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 581439503812440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114621772060160).

581439503812440 is an abundant number, since it is smaller than the sum of its proper divisors (1647804040307880).

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

581439503812440 is a wasteful number, since it uses less digits than its factorization.

581439503812440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611852 (or 611835 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 581439503812440 in words is "five hundred eighty-one trillion, four hundred thirty-nine billion, five hundred three million, eight hundred twelve thousand, four hundred forty".