12728757135 has 16 divisors (see below), whose sum is σ = 20521480320. Its totient is φ = 6736847520.

The previous prime is 12728757133. The next prime is 12728757143. The reversal of 12728757135 is 53175782721.

It is a happy number.

It is not a de Polignac number, because 12728757135 - 2¹ = 12728757133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728757133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3236905 + ... + 3240834.

It is an arithmetic number, because the mean of its divisors is an integer number (1282592520).

Almost surely, 2^12728757135 is an apocalyptic number.

12728757135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12728757135 is a deficient number, since it is larger than the sum of its proper divisors (7792723185).

12728757135 is a wasteful number, since it uses less digits than its factorization.

12728757135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477878.

The product of its digits is 823200, while the sum is 48.

The spelling of 12728757135 in words is "twelve billion, seven hundred twenty-eight million, seven hundred fifty-seven thousand, one hundred thirty-five".