2421389456640 has 3456 divisors, whose sum is σ = 11777560704000. Its totient is φ = 453173575680.

The previous prime is 2421389456537. The next prime is 2421389456687. The reversal of 2421389456640 is 466549831242.

2421389456640 is a `hidden beast` number, since 2 + 4 + 2 + 1 + 38 + 9 + 4 + 566 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 21428225224 + ... + 21428225336.

It is an arithmetic number, because the mean of its divisors is an integer number (3407859000).

Almost surely, 2^{2421389456640} is an apocalyptic number.

2421389456640 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 2421389456640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5888780352000).

2421389456640 is an abundant number, since it is smaller than the sum of its proper divisors (9356171247360).

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

2421389456640 is a wasteful number, since it uses less digits than its factorization.

2421389456640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 2421389456640 in words is "two trillion, four hundred twenty-one billion, three hundred eighty-nine million, four hundred fifty-six thousand, six hundred forty".