18285559649280 has 4752 divisors, whose sum is σ = 89242431602688. Its totient is φ = 3433483468800.

The previous prime is 18285559649251. The next prime is 18285559649293. The reversal of 18285559649280 is 8294695558281.

It is a happy number.

18285559649280 is a `hidden beast` number, since 1 + 8 + 2 + 8 + 5 + 5 + 59 + 6 + 492 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18285559649199 and 18285559649208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 143980784577 + ... + 143980784703.

Almost surely, 2^{18285559649280} is an apocalyptic number.

18285559649280 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 18285559649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44621215801344).

18285559649280 is an abundant number, since it is smaller than the sum of its proper divisors (70956871953408).

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

18285559649280 is a wasteful number, since it uses less digits than its factorization.

18285559649280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 497664000, while the sum is 72.

The spelling of 18285559649280 in words is "eighteen trillion, two hundred eighty-five billion, five hundred fifty-nine million, six hundred forty-nine thousand, two hundred eighty".