2543642649193 has 2 divisors, whose sum is σ = 2543642649194. Its totient is φ = 2543642649192.

The previous prime is 2543642649109. The next prime is 2543642649221. The reversal of 2543642649193 is 3919462463452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2504917132249 + 38725516944 = 1582693^2 + 196788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543642649193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543642649293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271821324596 + 1271821324597.

It is an arithmetic number, because the mean of its divisors is an integer number (1271821324597).

Almost surely, 2^{2543642649193} is an apocalyptic number.

It is an amenable number.

2543642649193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543642649193 is an equidigital number, since it uses as much as digits as its factorization.

2543642649193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 58.

The spelling of 2543642649193 in words is "two trillion, five hundred forty-three billion, six hundred forty-two million, six hundred forty-nine thousand, one hundred ninety-three".