11156728023 has 72 divisors (see below), whose sum is σ = 20584588752. Its totient is φ = 6000148224.

The previous prime is 11156728007. The next prime is 11156728031. The reversal of 11156728023 is 32082765111.

11156728023 is a `hidden beast` number, since 1 + 11 + 567 + 2 + 80 + 2 + 3 = 666.

It is not a de Polignac number, because 11156728023 - 2⁴ = 11156728007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156728003) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 174861 + ... + 229977.

It is an arithmetic number, because the mean of its divisors is an integer number (285897066).

Almost surely, 2^11156728023 is an apocalyptic number.

11156728023 is a deficient number, since it is larger than the sum of its proper divisors (9427860729).

11156728023 is an equidigital number, since it uses as much as digits as its factorization.

11156728023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55163 (or 55144 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 11156728023 in words is "eleven billion, one hundred fifty-six million, seven hundred twenty-eight thousand, twenty-three".