1817222047488 has 432 divisors, whose sum is σ = 5496623548416. Its totient is φ = 576714055680.

The previous prime is 1817222047481. The next prime is 1817222047489. The reversal of 1817222047488 is 8847402227181.

1817222047488 is a `hidden beast` number, since 1 + 8 + 1 + 72 + 2 + 20 + 474 + 88 = 666.

It is a super-2 number, since 2×1817222047488² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1817222047481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1879236381 + ... + 1879237347.

Almost surely, 2^{1817222047488} is an apocalyptic number.

1817222047488 is a gapful number since it is divisible by the number (18) 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 1817222047488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2748311774208).

1817222047488 is an abundant number, since it is smaller than the sum of its proper divisors (3679401500928).

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

1817222047488 is a wasteful number, since it uses less digits than its factorization.

1817222047488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 54.

The spelling of 1817222047488 in words is "one trillion, eight hundred seventeen billion, two hundred twenty-two million, forty-seven thousand, four hundred eighty-eight".