1581142750842 has 16 divisors (see below), whose sum is σ = 3328721580960. Its totient is φ = 499308237072.

The previous prime is 1581142750807. The next prime is 1581142750871. The reversal of 1581142750842 is 2480572411851.

It is a junction number, because it is equal to n+sod(n) for n = 1581142750791 and 1581142750800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6934836513 + ... + 6934836740.

It is an arithmetic number, because the mean of its divisors is an integer number (208045098810).

Almost surely, 2^{1581142750842} is an apocalyptic number.

1581142750842 is an abundant number, since it is smaller than the sum of its proper divisors (1747578830118).

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

1581142750842 is a wasteful number, since it uses less digits than its factorization.

1581142750842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869673277.

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 1581142750842 in words is "one trillion, five hundred eighty-one billion, one hundred forty-two million, seven hundred fifty thousand, eight hundred forty-two".