12786889407 has 4 divisors (see below), whose sum is σ = 17049185880. Its totient is φ = 8524592936.

The previous prime is 12786889397. The next prime is 12786889457. The reversal of 12786889407 is 70498868721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70498868721 = 3 ⋅23499622907.

It is a cyclic number.

It is not a de Polignac number, because 12786889407 - 2⁸ = 12786889151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12786889457) 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, 2131148232 + ... + 2131148237.

It is an arithmetic number, because the mean of its divisors is an integer number (4262296470).

Almost surely, 2^12786889407 is an apocalyptic number.

12786889407 is a deficient number, since it is larger than the sum of its proper divisors (4262296473).

12786889407 is an equidigital number, since it uses as much as digits as its factorization.

12786889407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262296472.

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 12786889407 in words is "twelve billion, seven hundred eighty-six million, eight hundred eighty-nine thousand, four hundred seven".