11509049656 has 32 divisors (see below), whose sum is σ = 23395428000. Its totient is φ = 5276211840.

The previous prime is 11509049647. The next prime is 11509049723. The reversal of 11509049656 is 65694090511.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 355860 + ... + 386851.

It is an arithmetic number, because the mean of its divisors is an integer number (731107125).

Almost surely, 2^11509049656 is an apocalyptic number.

It is an amenable number.

11509049656 is an abundant number, since it is smaller than the sum of its proper divisors (11886378344).

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

11509049656 is a wasteful number, since it uses less digits than its factorization.

11509049656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742879 (or 742875 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 11509049656 in words is "eleven billion, five hundred nine million, forty-nine thousand, six hundred fifty-six".