12999597861 has 24 divisors (see below), whose sum is σ = 18170429760. Its totient is φ = 8266145536.

The previous prime is 12999597851. The next prime is 12999597929. The reversal of 12999597861 is 16879599921.

12999597861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12999597861 - 2¹⁴ = 12999581477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12999597792 and 12999597801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12999597851) 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 in 23 ways as a sum of consecutive naturals, for example, 558325 + ... + 581141.

It is an arithmetic number, because the mean of its divisors is an integer number (757101240).

Almost surely, 2^12999597861 is an apocalyptic number.

It is an amenable number.

12999597861 is a deficient number, since it is larger than the sum of its proper divisors (5170831899).

12999597861 is a wasteful number, since it uses less digits than its factorization.

12999597861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23225 (or 23202 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 66.

The spelling of 12999597861 in words is "twelve billion, nine hundred ninety-nine million, five hundred ninety-seven thousand, eight hundred sixty-one".