1581793855842 has 32 divisors (see below), whose sum is σ = 3220628563584. Its totient is φ = 517815603200.

The previous prime is 1581793855751. The next prime is 1581793855853. The reversal of 1581793855842 is 2485583971851.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7114509 + ... + 7333472.

It is an arithmetic number, because the mean of its divisors is an integer number (100644642612).

Almost surely, 2^{1581793855842} is an apocalyptic number.

1581793855842 is an abundant number, since it is smaller than the sum of its proper divisors (1638834707742).

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

1581793855842 is a wasteful number, since it uses less digits than its factorization.

1581793855842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448314.

The product of its digits is 96768000, while the sum is 66.

The spelling of 1581793855842 in words is "one trillion, five hundred eighty-one billion, seven hundred ninety-three million, eight hundred fifty-five thousand, eight hundred forty-two".