581940904440 has 256 divisors, whose sum is σ = 2094501888000. Its totient is φ = 126542154240.

The previous prime is 581940904439. The next prime is 581940904469. The reversal of 581940904440 is 44409049185.

581940904440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 581940904440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1346971 + ... + 1725749.

It is an arithmetic number, because the mean of its divisors is an integer number (8181648000).

Almost surely, 2^581940904440 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 581940904440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047250944000).

581940904440 is an abundant number, since it is smaller than the sum of its proper divisors (1512560983560).

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

581940904440 is a wasteful number, since it uses less digits than its factorization.

581940904440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378890 (or 378886 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 581940904440 in words is "five hundred eighty-one billion, nine hundred forty million, nine hundred four thousand, four hundred forty".