1818301681536 has 128 divisors (see below), whose sum is σ = 4997574007200. Its totient is φ = 585064316928.

The previous prime is 1818301681517. The next prime is 1818301681577. The reversal of 1818301681536 is 6351861038181.

It is a tau number, because it is divible by the number of its divisors (128).

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, 54961896 + ... + 54994968.

Almost surely, 2^{1818301681536} is an apocalyptic number.

1818301681536 is a gapful number since it is divisible by the number (16) 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 1818301681536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2498787003600).

1818301681536 is an abundant number, since it is smaller than the sum of its proper divisors (3179272325664).

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

1818301681536 is a wasteful number, since it uses less digits than its factorization.

1818301681536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38056 (or 38044 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 1818301681536 in words is "one trillion, eight hundred eighteen billion, three hundred one million, six hundred eighty-one thousand, five hundred thirty-six".