2543626004081 has 2 divisors, whose sum is σ = 2543626004082. Its totient is φ = 2543626004080.

The previous prime is 2543626004063. The next prime is 2543626004111. The reversal of 2543626004081 is 1804006263452.

2543626004081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2019752592400 + 523873411681 = 1421180^2 + 723791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543626004081 is a prime.

It is a super-2 number, since 2×2543626004081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2543626004021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271813002040 + 1271813002041.

It is an arithmetic number, because the mean of its divisors is an integer number (1271813002041).

Almost surely, 2^{2543626004081} is an apocalyptic number.

It is an amenable number.

2543626004081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543626004081 is an equidigital number, since it uses as much as digits as its factorization.

2543626004081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 2543626004081 in words is "two trillion, five hundred forty-three billion, six hundred twenty-six million, four thousand, eighty-one".