11521656323 has 16 divisors (see below), whose sum is σ = 12047732736. Its totient is φ = 11005938720.

The previous prime is 11521656283. The next prime is 11521656331. The reversal of 11521656323 is 32365612511.

11521656323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11521656323 - 2⁸ = 11521656067 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521659323) 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 15 ways as a sum of consecutive naturals, for example, 1006490 + ... + 1017872.

It is an arithmetic number, because the mean of its divisors is an integer number (752983296).

Almost surely, 2^11521656323 is an apocalyptic number.

11521656323 is a deficient number, since it is larger than the sum of its proper divisors (526076413).

11521656323 is a wasteful number, since it uses less digits than its factorization.

11521656323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11834.

The product of its digits is 32400, while the sum is 35.

The spelling of 11521656323 in words is "eleven billion, five hundred twenty-one million, six hundred fifty-six thousand, three hundred twenty-three".