1808480021140 has 24 divisors (see below), whose sum is σ = 4089947125320. Its totient is φ = 667746469248.

The previous prime is 1808480021123. The next prime is 1808480021147. The reversal of 1808480021140 is 411200848081.

It can be written as a sum of positive squares in 4 ways, for example, as 97621253136 + 1710858768004 = 312444^2 + 1307998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1808480021140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808480021147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3477845935 + ... + 3477846454.

It is an arithmetic number, because the mean of its divisors is an integer number (170414463555).

Almost surely, 2^{1808480021140} is an apocalyptic number.

1808480021140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1808480021140 is an abundant number, since it is smaller than the sum of its proper divisors (2281467104180).

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

1808480021140 is a wasteful number, since it uses less digits than its factorization.

1808480021140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955692411 (or 6955692409 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 37.

The spelling of 1808480021140 in words is "one trillion, eight hundred eight billion, four hundred eighty million, twenty-one thousand, one hundred forty".