1819999680624 has 120 divisors (see below), whose sum is σ = 5212869247872. Its totient is φ = 592450588800.

The previous prime is 1819999680607. The next prime is 1819999680637. The reversal of 1819999680624 is 4260869999181.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38657899 + ... + 38704949.

Almost surely, 2^{1819999680624} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819999680624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2606434623936).

1819999680624 is an abundant number, since it is smaller than the sum of its proper divisors (3392869567248).

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

1819999680624 is a wasteful number, since it uses less digits than its factorization.

1819999680624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53355 (or 53346 counting only the distinct ones).

The product of its (nonzero) digits is 120932352, while the sum is 72.

The spelling of 1819999680624 in words is "one trillion, eight hundred nineteen billion, nine hundred ninety-nine million, six hundred eighty thousand, six hundred twenty-four".