1805441312640 has 256 divisors, whose sum is σ = 6591192606720. Its totient is φ = 411779579904.

The previous prime is 1805441312557. The next prime is 1805441312657. The reversal of 1805441312640 is 462131445081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6077652 + ... + 6367788.

It is an arithmetic number, because the mean of its divisors is an integer number (25746846120).

Almost surely, 2^{1805441312640} is an apocalyptic number.

1805441312640 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 1805441312640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3295596303360).

1805441312640 is an abundant number, since it is smaller than the sum of its proper divisors (4785751294080).

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

1805441312640 is a wasteful number, since it uses less digits than its factorization.

1805441312640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290629 (or 290617 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 1805441312640 in words is "one trillion, eight hundred five billion, four hundred forty-one million, three hundred twelve thousand, six hundred forty".