1813446049212 has 144 divisors (see below), whose sum is σ = 5447315607552. Its totient is φ = 497753406720.

The previous prime is 1813446049193. The next prime is 1813446049241. The reversal of 1813446049212 is 2129406443181.

1813446049212 is a `hidden beast` number, since 1 + 8 + 1 + 34 + 4 + 604 + 9 + 2 + 1 + 2 = 666.

It is a super-2 number, since 2×1813446049212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223033 + ... + 1917455.

It is an arithmetic number, because the mean of its divisors is an integer number (37828580608).

Almost surely, 2^{1813446049212} is an apocalyptic number.

1813446049212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813446049212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2723657803776).

1813446049212 is an abundant number, since it is smaller than the sum of its proper divisors (3633869558340).

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

1813446049212 is a wasteful number, since it uses less digits than its factorization.

1813446049212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694608 (or 1694603 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 1813446049212 in words is "one trillion, eight hundred thirteen billion, four hundred forty-six million, forty-nine thousand, two hundred twelve".