11116236440581 has 2 divisors, whose sum is σ = 11116236440582. Its totient is φ = 11116236440580.

The previous prime is 11116236440537. The next prime is 11116236440593. The reversal of 11116236440581 is 18504463261111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10338957930625 + 777278509956 = 3215425^2 + 881634^2 .

It is a cyclic number.

It is not a de Polignac number, because 11116236440581 - 2¹⁵ = 11116236407813 is a prime.

It is a super-2 number, since 2×11116236440581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11116236441581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5558118220290 + 5558118220291.

It is an arithmetic number, because the mean of its divisors is an integer number (5558118220291).

Almost surely, 2^{11116236440581} is an apocalyptic number.

It is an amenable number.

11116236440581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11116236440581 is an equidigital number, since it uses as much as digits as its factorization.

11116236440581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 11116236440581 in words is "eleven trillion, one hundred sixteen billion, two hundred thirty-six million, four hundred forty thousand, five hundred eighty-one".