13040281543689 has 15 divisors (see below), whose sum is σ = 19479975300247. Its totient is φ = 8693499362328.

The previous prime is 13040281543637. The next prime is 13040281543703. The reversal of 13040281543689 is 98634518204031.

It is a happy number.

The square root of 13040281543689 is 3611133.

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

13040281543689 is a `hidden beast` number, since 1 + 3 + 0 + 402 + 8 + 154 + 3 + 6 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8107031871225 + 4933249672464 = 2847285^2 + 2221092^2 .

It is not a de Polignac number, because 13040281543689 - 2⁷ = 13040281543561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13040281543609) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 32299579 + ... + 32700815.

Almost surely, 2^{13040281543689} is an apocalyptic number.

13040281543689 is the 3611133-rd square number.

13040281543689 is the 1805567-th centered octagonal number.

It is an amenable number.

13040281543689 is a deficient number, since it is larger than the sum of its proper divisors (6439693756558).

13040281543689 is an frugal number, since it uses more digits than its factorization.

13040281543689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802486 (or 401240 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 13040281543689 in words is "thirteen trillion, forty billion, two hundred eighty-one million, five hundred forty-three thousand, six hundred eighty-nine".