12581514043849 has 27 divisors (see below), whose sum is σ = 12962245739373. Its totient is φ = 12211844769432.

The previous prime is 12581514043829. The next prime is 12581514043873. The reversal of 12581514043849 is 94834041518521.

The square root of 12581514043849 is 3547043.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 12581514043849 - 2⁹ = 12581514043337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12581514043849.

It is not an unprimeable number, because it can be changed into a prime (12581514043829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27173896192 + ... + 27173896654.

Almost surely, 2^{12581514043849} is an apocalyptic number.

12581514043849 is the 3547043-rd square number.

12581514043849 is the 1773522-nd centered octagonal number.

It is an amenable number.

12581514043849 is a deficient number, since it is larger than the sum of its proper divisors (380731695524).

12581514043849 is an frugal number, since it uses more digits than its factorization.

12581514043849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 12581514043849 in words is "twelve trillion, five hundred eighty-one billion, five hundred fourteen million, forty-three thousand, eight hundred forty-nine".