581191964395728 has 120 divisors (see below), whose sum is σ = 1747302858415008. Its totient is φ = 165982427267328.

The previous prime is 581191964395643. The next prime is 581191964395733. The reversal of 581191964395728 is 827593469191185.

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 23 ways as a sum of consecutive naturals, for example, 48489426 + ... + 59275697.

Almost surely, 2^{581191964395728} is an apocalyptic number.

It is an amenable number.

581191964395728 is an abundant number, since it is smaller than the sum of its proper divisors (1166110894019280).

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

581191964395728 is a wasteful number, since it uses less digits than its factorization.

581191964395728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107767441 (or 107767428 counting only the distinct ones).

The product of its digits is 1175731200, while the sum is 78.

The spelling of 581191964395728 in words is "five hundred eighty-one trillion, one hundred ninety-one billion, nine hundred sixty-four million, three hundred ninety-five thousand, seven hundred twenty-eight".