2543640632518 has 16 divisors (see below), whose sum is σ = 3867888964896. Its totient is φ = 1254440070400.

The previous prime is 2543640632513. The next prime is 2543640632539. The reversal of 2543640632518 is 8152360463452.

2543640632518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2543640632518² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543640632513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23886571 + ... + 23992822.

It is an arithmetic number, because the mean of its divisors is an integer number (241743060306).

Almost surely, 2^{2543640632518} is an apocalyptic number.

2543640632518 is a deficient number, since it is larger than the sum of its proper divisors (1324248332378).

2543640632518 is a wasteful number, since it uses less digits than its factorization.

2543640632518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47879759.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 2543640632518 in words is "two trillion, five hundred forty-three billion, six hundred forty million, six hundred thirty-two thousand, five hundred eighteen".