2543122521440 has 144 divisors (see below), whose sum is σ = 6499902704400. Its totient is φ = 937661847552.

The previous prime is 2543122521437. The next prime is 2543122521449. The reversal of 2543122521440 is 441252213452.

It is a self number, because there is not a number n which added to its sum of digits gives 2543122521440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543122521449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3856226 + ... + 4467294.

It is an arithmetic number, because the mean of its divisors is an integer number (45138213225).

Almost surely, 2^{2543122521440} is an apocalyptic number.

2543122521440 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 2543122521440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3249951352200).

2543122521440 is an abundant number, since it is smaller than the sum of its proper divisors (3956780182960).

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

2543122521440 is a wasteful number, since it uses less digits than its factorization.

2543122521440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611177 (or 611132 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 2543122521440 its reverse (441252213452), we get a palindrome (2984374734892).

The spelling of 2543122521440 in words is "two trillion, five hundred forty-three billion, one hundred twenty-two million, five hundred twenty-one thousand, four hundred forty".