1805540898240 has 112 divisors (see below), whose sum is σ = 6369547088160. Its totient is φ = 481477570560.

The previous prime is 1805540898229. The next prime is 1805540898247. The reversal of 1805540898240 is 428980455081.

1805540898240 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 540 + 8 + 98 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805540898247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104478681 + ... + 104495960.

Almost surely, 2^{1805540898240} is an apocalyptic number.

1805540898240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1805540898240 is an abundant number, since it is smaller than the sum of its proper divisors (4564006189920).

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

1805540898240 is a wasteful number, since it uses less digits than its factorization.

1805540898240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208974667 (or 208974651 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 54.

The spelling of 1805540898240 in words is "one trillion, eight hundred five billion, five hundred forty million, eight hundred ninety-eight thousand, two hundred forty".