1812197783472 has 160 divisors (see below), whose sum is σ = 5064285240000. Its totient is φ = 556347162624.

The previous prime is 1812197783443. The next prime is 1812197783497. The reversal of 1812197783472 is 2743877912181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6915904 + ... + 7173152.

It is an arithmetic number, because the mean of its divisors is an integer number (31651782750).

Almost surely, 2^{1812197783472} is an apocalyptic number.

1812197783472 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 1812197783472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2532142620000).

1812197783472 is an abundant number, since it is smaller than the sum of its proper divisors (3252087456528).

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

1812197783472 is a wasteful number, since it uses less digits than its factorization.

1812197783472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257463 (or 257457 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 60.

The spelling of 1812197783472 in words is "one trillion, eight hundred twelve billion, one hundred ninety-seven million, seven hundred eighty-three thousand, four hundred seventy-two".