12861852128 has 24 divisors (see below), whose sum is σ = 25345930680. Its totient is φ = 6424790400.

The previous prime is 12861852127. The next prime is 12861852131. The reversal of 12861852128 is 82125816821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861852127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157583 + ... + 224846.

It is an arithmetic number, because the mean of its divisors is an integer number (1056080445).

Almost surely, 2^12861852128 is an apocalyptic number.

It is an amenable number.

12861852128 is a deficient number, since it is larger than the sum of its proper divisors (12484078552).

12861852128 is a wasteful number, since it uses less digits than its factorization.

12861852128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383490 (or 383482 counting only the distinct ones).

The product of its digits is 122880, while the sum is 44.

The spelling of 12861852128 in words is "twelve billion, eight hundred sixty-one million, eight hundred fifty-two thousand, one hundred twenty-eight".