12015857863 has 2 divisors, whose sum is σ = 12015857864. Its totient is φ = 12015857862.

The previous prime is 12015857807. The next prime is 12015857881. The reversal of 12015857863 is 36875851021.

12015857863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12015857863 - 2²¹ = 12013760711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12015807863) 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, 6007928931 + 6007928932.

It is an arithmetic number, because the mean of its divisors is an integer number (6007928932).

Almost surely, 2^12015857863 is an apocalyptic number.

12015857863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015857863 is an equidigital number, since it uses as much as digits as its factorization.

12015857863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 12015857863 in words is "twelve billion, fifteen million, eight hundred fifty-seven thousand, eight hundred sixty-three".