12864850507520 has 144 divisors (see below), whose sum is σ = 33659475550848. Its totient is φ = 4672179179520.

The previous prime is 12864850507513. The next prime is 12864850507529. The reversal of 12864850507520 is 2570505846821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12864850507529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10500467 + ... + 11661453.

It is an arithmetic number, because the mean of its divisors is an integer number (233746357992).

Almost surely, 2^{12864850507520} is an apocalyptic number.

12864850507520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12864850507520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16829737775424).

12864850507520 is an abundant number, since it is smaller than the sum of its proper divisors (20794625043328).

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

12864850507520 is a wasteful number, since it uses less digits than its factorization.

12864850507520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161806 (or 1161792 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 12864850507520 in words is "twelve trillion, eight hundred sixty-four billion, eight hundred fifty million, five hundred seven thousand, five hundred twenty".