11556729879 has 16 divisors (see below), whose sum is σ = 16268129280. Its totient is φ = 7277316480.

The previous prime is 11556729869. The next prime is 11556729893. The reversal of 11556729879 is 97892765511.

11556729879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11556729879 - 2⁸ = 11556729623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556729869) 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, 281607 + ... + 320024.

It is an arithmetic number, because the mean of its divisors is an integer number (1016758080).

Almost surely, 2^11556729879 is an apocalyptic number.

11556729879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11556729879 is a deficient number, since it is larger than the sum of its proper divisors (4711399401).

11556729879 is a wasteful number, since it uses less digits than its factorization.

11556729879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601990.

The product of its digits is 9525600, while the sum is 60.

The spelling of 11556729879 in words is "eleven billion, five hundred fifty-six million, seven hundred twenty-nine thousand, eight hundred seventy-nine".