2543561831400 has 192 divisors, whose sum is σ = 8385654444480. Its totient is φ = 635571302400.

The previous prime is 2543561831387. The next prime is 2543561831411. The reversal of 2543561831400 is 41381653452.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1766130 + ... + 2864670.

It is an arithmetic number, because the mean of its divisors is an integer number (43675283565).

Almost surely, 2^{2543561831400} is an apocalyptic number.

2543561831400 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 2543561831400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4192827222240).

2543561831400 is an abundant number, since it is smaller than the sum of its proper divisors (5842092613080).

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

2543561831400 is a wasteful number, since it uses less digits than its factorization.

2543561831400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098804 (or 1098795 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 2543561831400 in words is "two trillion, five hundred forty-three billion, five hundred sixty-one million, eight hundred thirty-one thousand, four hundred".