11081280863511 has 24 divisors (see below), whose sum is σ = 16040555250720. Its totient is φ = 7371724087296.

The previous prime is 11081280863507. The next prime is 11081280863621. The reversal of 11081280863511 is 11536808218011.

11081280863511 is a `hidden beast` number, since 1 + 1 + 0 + 8 + 1 + 2 + 8 + 0 + 8 + 635 + 1 + 1 = 666.

It is not a de Polignac number, because 11081280863511 - 2² = 11081280863507 is a prime.

It is a super-2 number, since 2×11081280863511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11081280863111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7585710 + ... + 8927796.

It is an arithmetic number, because the mean of its divisors is an integer number (668356468780).

Almost surely, 2^{11081280863511} is an apocalyptic number.

11081280863511 is a deficient number, since it is larger than the sum of its proper divisors (4959274387209).

11081280863511 is a wasteful number, since it uses less digits than its factorization.

11081280863511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344055 (or 1344052 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 11081280863511 in words is "eleven trillion, eighty-one billion, two hundred eighty million, eight hundred sixty-three thousand, five hundred eleven".