2543387346481 has 4 divisors (see below), whose sum is σ = 2545807316464. Its totient is φ = 2540967376500.

The previous prime is 2543387346473. The next prime is 2543387346509. The reversal of 2543387346481 is 1846437833452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2543387346481 - 2³ = 2543387346473 is a prime.

It is a super-2 number, since 2×2543387346481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543387346781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1209983415 + ... + 1209985516.

It is an arithmetic number, because the mean of its divisors is an integer number (636451829116).

Almost surely, 2^{2543387346481} is an apocalyptic number.

It is an amenable number.

2543387346481 is a deficient number, since it is larger than the sum of its proper divisors (2419969983).

2543387346481 is a wasteful number, since it uses less digits than its factorization.

2543387346481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419969982.

The product of its digits is 46448640, while the sum is 58.

The spelling of 2543387346481 in words is "two trillion, five hundred forty-three billion, three hundred eighty-seven million, three hundred forty-six thousand, four hundred eighty-one".