2581158726481 has 2 divisors, whose sum is σ = 2581158726482. Its totient is φ = 2581158726480.

The previous prime is 2581158726397. The next prime is 2581158726577. The reversal of 2581158726481 is 1846278511852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1987087748881 + 594070977600 = 1409641^2 + 770760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581158726481 - 2¹¹ = 2581158724433 is a prime.

It is a super-2 number, since 2×2581158726481² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2581158726581) 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, 1290579363240 + 1290579363241.

It is an arithmetic number, because the mean of its divisors is an integer number (1290579363241).

Almost surely, 2^{2581158726481} is an apocalyptic number.

It is an amenable number.

2581158726481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581158726481 is an equidigital number, since it uses as much as digits as its factorization.

2581158726481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8601600, while the sum is 58.

The spelling of 2581158726481 in words is "two trillion, five hundred eighty-one billion, one hundred fifty-eight million, seven hundred twenty-six thousand, four hundred eighty-one".