11811517268 has 12 divisors (see below), whose sum is σ = 20671649460. Its totient is φ = 5905331712.

The previous prime is 11811517259. The next prime is 11811517303. The reversal of 11811517268 is 86271511811.

It can be written as a sum of positive squares in 2 ways, for example, as 1632321604 + 10179195664 = 40402^2 + 100892^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39821 + ... + 158772.

It is an arithmetic number, because the mean of its divisors is an integer number (1722637455).

Almost surely, 2^11811517268 is an apocalyptic number.

It is an amenable number.

11811517268 is a deficient number, since it is larger than the sum of its proper divisors (8860132192).

11811517268 is a wasteful number, since it uses less digits than its factorization.

11811517268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213466 (or 213464 counting only the distinct ones).

The product of its digits is 26880, while the sum is 41.

The spelling of 11811517268 in words is "eleven billion, eight hundred eleven million, five hundred seventeen thousand, two hundred sixty-eight".