12505000000 has 224 divisors, whose sum is σ = 32295620448. Its totient is φ = 4800000000.

The previous prime is 12504999989. The next prime is 12505000037. The reversal of 12505000000 is 50521.

It can be written as a sum of positive squares in 16 ways, for example, as 118200384 + 12386799616 = 10872^2 + 111296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204999970 + ... + 205000030.

It is an arithmetic number, because the mean of its divisors is an integer number (144176877).

Almost surely, 2^12505000000 is an apocalyptic number.

12505000000 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 12505000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16147810224).

12505000000 is an abundant number, since it is smaller than the sum of its proper divisors (19790620448).

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

12505000000 is an frugal number, since it uses more digits than its factorization.

12505000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

Adding to 12505000000 its reverse (50521), we get a palindrome (12505050521).

The spelling of 12505000000 in words is "twelve billion, five hundred five million", and thus it is an aban number.