12805790287 has 4 divisors (see below), whose sum is σ = 13022837640. Its totient is φ = 12588742936.

The previous prime is 12805790267. The next prime is 12805790357. The reversal of 12805790287 is 78209750821.

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

It is a cyclic number.

It is not a de Polignac number, because 12805790287 - 2¹⁵ = 12805757519 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 12805790287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805790237) 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, 108523588 + ... + 108523705.

It is an arithmetic number, because the mean of its divisors is an integer number (3255709410).

Almost surely, 2^12805790287 is an apocalyptic number.

12805790287 is a deficient number, since it is larger than the sum of its proper divisors (217047353).

12805790287 is an equidigital number, since it uses as much as digits as its factorization.

12805790287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217047352.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 12805790287 in words is "twelve billion, eight hundred five million, seven hundred ninety thousand, two hundred eighty-seven".