11531641266 has 48 divisors (see below), whose sum is σ = 25464530520. Its totient is φ = 3770841600.

The previous prime is 11531641259. The next prime is 11531641279. The reversal of 11531641266 is 66214613511.

11531641266 is a `hidden beast` number, since 1 + 1 + 5 + 3 + 1 + 641 + 2 + 6 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11531538225 + 103041 = 107385^2 + 321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11531641266.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 169066 + ... + 227258.

Almost surely, 2^11531641266 is an apocalyptic number.

11531641266 is an abundant number, since it is smaller than the sum of its proper divisors (13932889254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11531641266 is a wasteful number, since it uses less digits than its factorization.

11531641266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58411 (or 58408 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 11531641266 in words is "eleven billion, five hundred thirty-one million, six hundred forty-one thousand, two hundred sixty-six".