2543216523918 has 32 divisors (see below), whose sum is σ = 5813170384896. Its totient is φ = 726620287008.

The previous prime is 2543216523901. The next prime is 2543216523941. The reversal of 2543216523918 is 8193256123452.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1969555 + ... + 2994257.

It is an arithmetic number, because the mean of its divisors is an integer number (181661574528).

Almost surely, 2^{2543216523918} is an apocalyptic number.

2543216523918 is an abundant number, since it is smaller than the sum of its proper divisors (3269953860978).

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

2543216523918 is a wasteful number, since it uses less digits than its factorization.

2543216523918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083808.

The product of its digits is 3110400, while the sum is 51.

The spelling of 2543216523918 in words is "two trillion, five hundred forty-three billion, two hundred sixteen million, five hundred twenty-three thousand, nine hundred eighteen".