1801826490828 has 576 divisors, whose sum is σ = 5483047944192. Its totient is φ = 450383431680.

The previous prime is 1801826490803. The next prime is 1801826490881. The reversal of 1801826490828 is 8280946281081.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5756634000 + ... + 5756634312.

Almost surely, 2^{1801826490828} 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 1801826490828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2741523972096).

1801826490828 is an abundant number, since it is smaller than the sum of its proper divisors (3681221453364).

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

1801826490828 is a wasteful number, since it uses less digits than its factorization.

1801826490828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 57.

The spelling of 1801826490828 in words is "one trillion, eight hundred one billion, eight hundred twenty-six million, four hundred ninety thousand, eight hundred twenty-eight".