2040643800840 has 128 divisors (see below), whose sum is σ = 6199937884800. Its totient is φ = 537273077760.

The previous prime is 2040643800817. The next prime is 2040643800857. The reversal of 2040643800840 is 480083460402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3426000 + ... + 3977280.

It is an arithmetic number, because the mean of its divisors is an integer number (48437014725).

Almost surely, 2^{2040643800840} is an apocalyptic number.

2040643800840 is a gapful number since it is divisible by the number (20) 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 2040643800840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3099968942400).

2040643800840 is an abundant number, since it is smaller than the sum of its proper divisors (4159294083960).

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

2040643800840 is a wasteful number, since it uses less digits than its factorization.

2040643800840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551687 (or 551683 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 2040643800840 in words is "two trillion, forty billion, six hundred forty-three million, eight hundred thousand, eight hundred forty".