1805853603840 has 1536 divisors, whose sum is σ = 7223117690880. Its totient is φ = 378902937600.

The previous prime is 1805853603833. The next prime is 1805853603881. The reversal of 1805853603840 is 483063585081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1536).

It is a super-2 number, since 2×1805853603840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6163322734 + ... + 6163323026.

It is an arithmetic number, because the mean of its divisors is an integer number (4702550580).

Almost surely, 2^{1805853603840} is an apocalyptic number.

1805853603840 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 1805853603840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3611558845440).

1805853603840 is an abundant number, since it is smaller than the sum of its proper divisors (5417264087040).

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

1805853603840 is a wasteful number, since it uses less digits than its factorization.

1805853603840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 1805853603840 in words is "one trillion, eight hundred five billion, eight hundred fifty-three million, six hundred three thousand, eight hundred forty".