1811383346912 has 24 divisors (see below), whose sum is σ = 3653140502592. Its totient is φ = 883601632000.

The previous prime is 1811383346891. The next prime is 1811383346933. The reversal of 1811383346912 is 2196433831181.

It is an interprime number because it is at equal distance from previous prime (1811383346891) and next prime (1811383346933).

It is a super-2 number, since 2×1811383346912² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690312464 + ... + 690315087.

It is an arithmetic number, because the mean of its divisors is an integer number (152214187608).

Almost surely, 2^{1811383346912} is an apocalyptic number.

It is an amenable number.

1811383346912 is an abundant number, since it is smaller than the sum of its proper divisors (1841757155680).

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

1811383346912 is a wasteful number, since it uses less digits than its factorization.

1811383346912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380627602 (or 1380627594 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The spelling of 1811383346912 in words is "one trillion, eight hundred eleven billion, three hundred eighty-three million, three hundred forty-six thousand, nine hundred twelve".