12415728138 has 32 divisors (see below), whose sum is σ = 27415245312. Its totient is φ = 3717010800.

The previous prime is 12415728097. The next prime is 12415728151. The reversal of 12415728138 is 83182751421.

It is a self number, because there is not a number n which added to its sum of digits gives 12415728138.

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, 1127758 + ... + 1138713.

It is an arithmetic number, because the mean of its divisors is an integer number (856726416).

Almost surely, 2^12415728138 is an apocalyptic number.

12415728138 is an abundant number, since it is smaller than the sum of its proper divisors (14999517174).

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

12415728138 is a wasteful number, since it uses less digits than its factorization.

12415728138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266570.

The product of its digits is 107520, while the sum is 42.

The spelling of 12415728138 in words is "twelve billion, four hundred fifteen million, seven hundred twenty-eight thousand, one hundred thirty-eight".