1818641893360 has 80 divisors (see below), whose sum is σ = 4336535301120. Its totient is φ = 708920029440.

The previous prime is 1818641893349. The next prime is 1818641893447. The reversal of 1818641893360 is 633981468181.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1818641893360² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1818641893295 and 1818641893304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908025 + ... + 2112295.

It is an arithmetic number, because the mean of its divisors is an integer number (54206691264).

Almost surely, 2^{1818641893360} is an apocalyptic number.

1818641893360 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 1818641893360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168267650560).

1818641893360 is an abundant number, since it is smaller than the sum of its proper divisors (2517893407760).

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

1818641893360 is a wasteful number, since it uses less digits than its factorization.

1818641893360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204766 (or 1204760 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 1818641893360 in words is "one trillion, eight hundred eighteen billion, six hundred forty-one million, eight hundred ninety-three thousand, three hundred sixty".