1813936594872 has 16 divisors (see below), whose sum is σ = 4534841487240. Its totient is φ = 604645531616.

The previous prime is 1813936594871. The next prime is 1813936594901. The reversal of 1813936594872 is 2784956393181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813936594871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37790345703 + ... + 37790345750.

Almost surely, 2^{1813936594872} is an apocalyptic number.

1813936594872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1813936594872 is an abundant number, since it is smaller than the sum of its proper divisors (2720904892368).

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

1813936594872 is a wasteful number, since it uses less digits than its factorization.

1813936594872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75580691462 (or 75580691458 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 66.

The spelling of 1813936594872 in words is "one trillion, eight hundred thirteen billion, nine hundred thirty-six million, five hundred ninety-four thousand, eight hundred seventy-two".