581203855134 has 144 divisors (see below), whose sum is σ = 1595142104400. Its totient is φ = 151893439488.

The previous prime is 581203855121. The next prime is 581203855157. The reversal of 581203855134 is 431558302185.

581203855134 is a `hidden beast` number, since 5 + 8 + 120 + 3 + 8 + 5 + 513 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 581203855134.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 111987 + ... + 1083950.

It is an arithmetic number, because the mean of its divisors is an integer number (11077375725).

Almost surely, 2^581203855134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581203855134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797571052200).

581203855134 is an abundant number, since it is smaller than the sum of its proper divisors (1013938249266).

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

581203855134 is a wasteful number, since it uses less digits than its factorization.

581203855134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196007 (or 1195997 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 581203855134 in words is "five hundred eighty-one billion, two hundred three million, eight hundred fifty-five thousand, one hundred thirty-four".