2421771844440 has 512 divisors, whose sum is σ = 8476203294720. Its totient is φ = 548118724608.

The previous prime is 2421771844433. The next prime is 2421771844477. The reversal of 2421771844440 is 444481771242.

It is a self number, because there is not a number n which added to its sum of digits gives 2421771844440.

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, 838852677 + ... + 838855563.

It is an arithmetic number, because the mean of its divisors is an integer number (16555084560).

Almost surely, 2^{2421771844440} is an apocalyptic number.

2421771844440 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 2421771844440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4238101647360).

2421771844440 is an abundant number, since it is smaller than the sum of its proper divisors (6054431450280).

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

2421771844440 is a wasteful number, since it uses less digits than its factorization.

2421771844440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 48.

The spelling of 2421771844440 in words is "two trillion, four hundred twenty-one billion, seven hundred seventy-one million, eight hundred forty-four thousand, four hundred forty".