12890040265 has 4 divisors (see below), whose sum is σ = 15468048324. Its totient is φ = 10312032208.

The previous prime is 12890040253. The next prime is 12890040269. The reversal of 12890040265 is 56204009821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1315077696 + 11574962569 = 36264^2 + 107587^2 .

It is a cyclic number.

It is not a de Polignac number, because 12890040265 - 2¹³ = 12890032073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12890040269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289004022 + ... + 1289004031.

It is an arithmetic number, because the mean of its divisors is an integer number (3867012081).

Almost surely, 2^12890040265 is an apocalyptic number.

It is an amenable number.

12890040265 is a deficient number, since it is larger than the sum of its proper divisors (2578008059).

12890040265 is an equidigital number, since it uses as much as digits as its factorization.

12890040265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578008058.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 12890040265 in words is "twelve billion, eight hundred ninety million, forty thousand, two hundred sixty-five".