2543243146542 has 72 divisors (see below), whose sum is σ = 6415220683872. Its totient is φ = 726050304000.

The previous prime is 2543243146463. The next prime is 2543243146547. The reversal of 2543243146542 is 2456413423452.

2543243146542 is a `hidden beast` number, since 2 + 5 + 4 + 32 + 4 + 31 + 46 + 542 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543243146547) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85459 + ... + 2256942.

It is an arithmetic number, because the mean of its divisors is an integer number (89100287276).

Almost surely, 2^{2543243146542} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543243146542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3207610341936).

2543243146542 is an abundant number, since it is smaller than the sum of its proper divisors (3871977537330).

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

2543243146542 is a wasteful number, since it uses less digits than its factorization.

2543243146542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343654 (or 2343644 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 45.

Adding to 2543243146542 its reverse (2456413423452), we get a palindrome (4999656569994).

The spelling of 2543243146542 in words is "two trillion, five hundred forty-three billion, two hundred forty-three million, one hundred forty-six thousand, five hundred forty-two".