12889568085 has 64 divisors (see below), whose sum is σ = 22008602880. Its totient is φ = 6429265920.

The previous prime is 12889568039. The next prime is 12889568093. The reversal of 12889568085 is 58086598821.

It is not a de Polignac number, because 12889568085 - 2²¹ = 12887470933 is a prime.

It is a super-2 number, since 2×12889568085² (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 63 ways as a sum of consecutive naturals, for example, 3877234 + ... + 3880556.

It is an arithmetic number, because the mean of its divisors is an integer number (343884420).

Almost surely, 2^12889568085 is an apocalyptic number.

12889568085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12889568085 is a deficient number, since it is larger than the sum of its proper divisors (9119034795).

12889568085 is a wasteful number, since it uses less digits than its factorization.

12889568085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638.

The product of its (nonzero) digits is 11059200, while the sum is 60.

The spelling of 12889568085 in words is "twelve billion, eight hundred eighty-nine million, five hundred sixty-eight thousand, eighty-five".