1931440891792 has 40 divisors (see below), whose sum is σ = 3783364920576. Its totient is φ = 955118403456.

The previous prime is 1931440891789. The next prime is 1931440891823. The reversal of 1931440891792 is 2971980441391.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 109878 + ... + 1968490.

Almost surely, 2^{1931440891792} is an apocalyptic number.

It is an amenable number.

1931440891792 is a deficient number, since it is larger than the sum of its proper divisors (1851924028784).

1931440891792 is a wasteful number, since it uses less digits than its factorization.

1931440891792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859335 (or 1859329 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 1931440891792 in words is "one trillion, nine hundred thirty-one billion, four hundred forty million, eight hundred ninety-one thousand, seven hundred ninety-two".