1816349969280 has 1792 divisors, whose sum is σ = 7983482031360. Its totient is φ = 346961018880.

The previous prime is 1816349969267. The next prime is 1816349969299. The reversal of 1816349969280 is 829699436181.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 42240696939 + ... + 42240696981.

Almost surely, 2^{1816349969280} is an apocalyptic number.

1816349969280 is a gapful number since it is divisible by the number (10) 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 1816349969280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3991741015680).

1816349969280 is an abundant number, since it is smaller than the sum of its proper divisors (6167132062080).

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

1816349969280 is an frugal number, since it uses more digits than its factorization.

1816349969280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 66.

The spelling of 1816349969280 in words is "one trillion, eight hundred sixteen billion, three hundred forty-nine million, nine hundred sixty-nine thousand, two hundred eighty".