12857839864 has 16 divisors (see below), whose sum is σ = 24120540000. Its totient is φ = 6425695872.

The previous prime is 12857839861. The next prime is 12857839901. The reversal of 12857839864 is 46893875821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857839861) 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, 386017 + ... + 418000.

It is an arithmetic number, because the mean of its divisors is an integer number (1507533750).

Almost surely, 2^12857839864 is an apocalyptic number.

It is an amenable number.

12857839864 is a deficient number, since it is larger than the sum of its proper divisors (11262700136).

12857839864 is a wasteful number, since it uses less digits than its factorization.

12857839864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806022 (or 806018 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 61.

The spelling of 12857839864 in words is "twelve billion, eight hundred fifty-seven million, eight hundred thirty-nine thousand, eight hundred sixty-four".