12506009736 has 64 divisors (see below), whose sum is σ = 34182262080. Its totient is φ = 3781370880.

The previous prime is 12506009723. The next prime is 12506009743. The reversal of 12506009736 is 63790060521.

It is a junction number, because it is equal to n+sod(n) for n = 12506009694 and 12506009703.

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, 68820 + ... + 172476.

It is an arithmetic number, because the mean of its divisors is an integer number (534097845).

Almost surely, 2^12506009736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12506009736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17091131040).

12506009736 is an abundant number, since it is smaller than the sum of its proper divisors (21676252344).

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

12506009736 is a wasteful number, since it uses less digits than its factorization.

12506009736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104134 (or 104130 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 12506009736 in words is "twelve billion, five hundred six million, nine thousand, seven hundred thirty-six".