15881206768241 has 2 divisors, whose sum is σ = 15881206768242. Its totient is φ = 15881206768240.

The previous prime is 15881206768177. The next prime is 15881206768277. The reversal of 15881206768241 is 14286760218851.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9826162278241 + 6055044490000 = 3134671^2 + 2460700^2 .

It is a cyclic number.

It is not a de Polignac number, because 15881206768241 - 2⁶ = 15881206768177 is a prime.

It is not a weakly prime, because it can be changed into another prime (15881206761241) 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, 7940603384120 + 7940603384121.

It is an arithmetic number, because the mean of its divisors is an integer number (7940603384121).

Almost surely, 2^{15881206768241} is an apocalyptic number.

It is an amenable number.

15881206768241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15881206768241 is an equidigital number, since it uses as much as digits as its factorization.

15881206768241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10321920, while the sum is 59.

The spelling of 15881206768241 in words is "fifteen trillion, eight hundred eighty-one billion, two hundred six million, seven hundred sixty-eight thousand, two hundred forty-one".