11328538663081 has 2 divisors, whose sum is σ = 11328538663082. Its totient is φ = 11328538663080.

The previous prime is 11328538663021. The next prime is 11328538663087. The reversal of 11328538663081 is 18036683582311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8267120067600 + 3061418595481 = 2875260^2 + 1749691^2 .

It is a cyclic number.

It is not a de Polignac number, because 11328538663081 - 2¹⁹ = 11328538138793 is a prime.

It is a super-2 number, since 2×11328538663081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11328538663087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5664269331540 + 5664269331541.

It is an arithmetic number, because the mean of its divisors is an integer number (5664269331541).

Almost surely, 2^{11328538663081} is an apocalyptic number.

It is an amenable number.

11328538663081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11328538663081 is an equidigital number, since it uses as much as digits as its factorization.

11328538663081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 11328538663081 in words is "eleven trillion, three hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-three thousand, eighty-one".