12864895686 has 32 divisors (see below), whose sum is σ = 28619280480. Its totient is φ = 4283705088.

The previous prime is 12864895633. The next prime is 12864895691. The reversal of 12864895686 is 68659846821.

12864895686 is a `hidden beast` number, since 1 + 2 + 8 + 64 + 8 + 9 + 568 + 6 = 666.

It is a super-2 number, since 2×12864895686² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76531 + ... + 177726.

It is an arithmetic number, because the mean of its divisors is an integer number (894352515).

Almost surely, 2^12864895686 is an apocalyptic number.

12864895686 is an abundant number, since it is smaller than the sum of its proper divisors (15754384794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12864895686 is a wasteful number, since it uses less digits than its factorization.

12864895686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255205 (or 255199 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 12864895686 in words is "twelve billion, eight hundred sixty-four million, eight hundred ninety-five thousand, six hundred eighty-six".