12571331736 has 32 divisors (see below), whose sum is σ = 32159223360. Its totient is φ = 4092991392.

The previous prime is 12571331657. The next prime is 12571331753. The reversal of 12571331736 is 63713317521.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12571331694 and 12571331703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6089730 + ... + 6091793.

It is an arithmetic number, because the mean of its divisors is an integer number (1004975730).

Almost surely, 2^12571331736 is an apocalyptic number.

It is an amenable number.

12571331736 is an abundant number, since it is smaller than the sum of its proper divisors (19587891624).

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

12571331736 is a wasteful number, since it uses less digits than its factorization.

12571331736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12181575 (or 12181571 counting only the distinct ones).

The product of its digits is 79380, while the sum is 39.

The spelling of 12571331736 in words is "twelve billion, five hundred seventy-one million, three hundred thirty-one thousand, seven hundred thirty-six".