12015857807 has 2 divisors, whose sum is σ = 12015857808. Its totient is φ = 12015857806.

The previous prime is 12015857783. The next prime is 12015857863. The reversal of 12015857807 is 70875851021.

12015857807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (70875851021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12015857807 - 2⁸ = 12015857551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12015857107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007928903 + 6007928904.

It is an arithmetic number, because the mean of its divisors is an integer number (6007928904).

Almost surely, 2^12015857807 is an apocalyptic number.

12015857807 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015857807 is an equidigital number, since it uses as much as digits as its factorization.

12015857807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 12015857807 in words is "twelve billion, fifteen million, eight hundred fifty-seven thousand, eight hundred seven".