1041026615581 has 2 divisors, whose sum is σ = 1041026615582. Its totient is φ = 1041026615580.

The previous prime is 1041026615543. The next prime is 1041026615609. The reversal of 1041026615581 is 1855166201401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740787276100 + 300239339481 = 860690^2 + 547941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1041026615581 - 2¹⁹ = 1041026091293 is a prime.

It is a super-2 number, since 2×1041026615581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1041026615521) by changing a digit.

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 as a sum of consecutive naturals, namely, 520513307790 + 520513307791.

It is an arithmetic number, because the mean of its divisors is an integer number (520513307791).

Almost surely, 2^{1041026615581} is an apocalyptic number.

It is an amenable number.

1041026615581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1041026615581 is an equidigital number, since it uses as much as digits as its factorization.

1041026615581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 1041026615581 in words is "one trillion, forty-one billion, twenty-six million, six hundred fifteen thousand, five hundred eighty-one".