12724041656105 has 32 divisors (see below), whose sum is σ = 16514925386400. Its totient is φ = 9355411169280.

The previous prime is 12724041656083. The next prime is 12724041656111. The reversal of 12724041656105 is 50165614042721.

It can be written as a sum of positive squares in 16 ways, for example, as 4418134948096 + 8305906708009 = 2101936^2 + 2881997^2 .

It is not a de Polignac number, because 12724041656105 - 2⁸ = 12724041655849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14747171 + ... + 15586119.

It is an arithmetic number, because the mean of its divisors is an integer number (516091418325).

Almost surely, 2^{12724041656105} is an apocalyptic number.

It is an amenable number.

12724041656105 is a deficient number, since it is larger than the sum of its proper divisors (3790883730295).

12724041656105 is a wasteful number, since it uses less digits than its factorization.

12724041656105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839981.

The product of its (nonzero) digits is 403200, while the sum is 44.

Adding to 12724041656105 its reverse (50165614042721), we get a palindrome (62889655698826).

The spelling of 12724041656105 in words is "twelve trillion, seven hundred twenty-four billion, forty-one million, six hundred fifty-six thousand, one hundred five".