12015857859 has 8 divisors (see below), whose sum is σ = 16170874560. Its totient is φ = 7935706536.

The previous prime is 12015857807. The next prime is 12015857863. The reversal of 12015857859 is 95875851021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12015857859 - 2¹¹ = 12015855811 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12015857059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18715969 + ... + 18716610.

It is an arithmetic number, because the mean of its divisors is an integer number (2021359320).

Almost surely, 2^12015857859 is an apocalyptic number.

12015857859 is a deficient number, since it is larger than the sum of its proper divisors (4155016701).

12015857859 is a wasteful number, since it uses less digits than its factorization.

12015857859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37432689.

The product of its (nonzero) digits is 1008000, while the sum is 51.

The spelling of 12015857859 in words is "twelve billion, fifteen million, eight hundred fifty-seven thousand, eight hundred fifty-nine".