1817011816812 has 60 divisors (see below), whose sum is σ = 4769575451256. Its totient is φ = 605670579360.

The previous prime is 1817011816709. The next prime is 1817011816813. The reversal of 1817011816812 is 2186181107181.

It is not an unprimeable number, because it can be changed into a prime (1817011816813) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11460489 + ... + 11617952.

Almost surely, 2^{1817011816812} is an apocalyptic number.

1817011816812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1817011816812 is an abundant number, since it is smaller than the sum of its proper divisors (2952563634444).

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

1817011816812 is an frugal number, since it uses more digits than its factorization.

1817011816812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23078472 (or 23078446 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 45.

The spelling of 1817011816812 in words is "one trillion, eight hundred seventeen billion, eleven million, eight hundred sixteen thousand, eight hundred twelve".