11539435656 has 32 divisors (see below), whose sum is σ = 32969816640. Its totient is φ = 3296981568.

The previous prime is 11539435631. The next prime is 11539435657. The reversal of 11539435656 is 65653493511.

11539435656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11539435657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34343391 + ... + 34343726.

It is an arithmetic number, because the mean of its divisors is an integer number (1030306770).

Almost surely, 2^11539435656 is an apocalyptic number.

It is an amenable number.

11539435656 is an abundant number, since it is smaller than the sum of its proper divisors (21430380984).

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

11539435656 is a wasteful number, since it uses less digits than its factorization.

11539435656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68687133 (or 68687129 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 48.

The spelling of 11539435656 in words is "eleven billion, five hundred thirty-nine million, four hundred thirty-five thousand, six hundred fifty-six".