11528772866 has 32 divisors (see below), whose sum is σ = 18883803456. Its totient is φ = 5247000000.

The previous prime is 11528772863. The next prime is 11528772889. The reversal of 11528772866 is 66827782511.

It is not an unprimeable number, because it can be changed into a prime (11528772863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650381 + ... + 667871.

It is an arithmetic number, because the mean of its divisors is an integer number (590118858).

Almost surely, 2^11528772866 is an apocalyptic number.

11528772866 is a deficient number, since it is larger than the sum of its proper divisors (7355030590).

11528772866 is a wasteful number, since it uses less digits than its factorization.

11528772866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17858.

The product of its digits is 2257920, while the sum is 53.

The spelling of 11528772866 in words is "eleven billion, five hundred twenty-eight million, seven hundred seventy-two thousand, eight hundred sixty-six".