12856550999 has 2 divisors, whose sum is σ = 12856551000. Its totient is φ = 12856550998.

The previous prime is 12856550983. The next prime is 12856551013. The reversal of 12856550999 is 99905565821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12856550999 - 2⁴ = 12856550983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12856550909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428275499 + 6428275500.

It is an arithmetic number, because the mean of its divisors is an integer number (6428275500).

Almost surely, 2^12856550999 is an apocalyptic number.

12856550999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856550999 is an equidigital number, since it uses as much as digits as its factorization.

12856550999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748000, while the sum is 59.

The spelling of 12856550999 in words is "twelve billion, eight hundred fifty-six million, five hundred fifty thousand, nine hundred ninety-nine".