2571998851440 has 400 divisors, whose sum is σ = 8997293118528. Its totient is φ = 680942702592.

The previous prime is 2571998851421. The next prime is 2571998851441. The reversal of 2571998851440 is 441588991752.

2571998851440 is a `hidden beast` number, since 2 + 5 + 71 + 9 + 9 + 8 + 8 + 514 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2571998851441) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 563168037 + ... + 563172603.

Almost surely, 2^{2571998851440} is an apocalyptic number.

2571998851440 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 2571998851440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4498646559264).

2571998851440 is an abundant number, since it is smaller than the sum of its proper divisors (6425294267088).

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

2571998851440 is a wasteful number, since it uses less digits than its factorization.

2571998851440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198 (or 5183 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 63.

The spelling of 2571998851440 in words is "two trillion, five hundred seventy-one billion, nine hundred ninety-eight million, eight hundred fifty-one thousand, four hundred forty".