12507812500 has 60 divisors (see below), whose sum is σ = 27377926884. Its totient is φ = 5000000000.

The previous prime is 12507812489. The next prime is 12507812507. The reversal of 12507812500 is 521870521.

It can be written as a sum of positive squares in 10 ways, for example, as 3029621764 + 9478190736 = 55042^2 + 97356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12507812507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7811700 + ... + 7813300.

Almost surely, 2^12507812500 is an apocalyptic number.

12507812500 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 12507812500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13688963442).

12507812500 is an abundant number, since it is smaller than the sum of its proper divisors (14870114384).

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

12507812500 is an frugal number, since it uses more digits than its factorization.

12507812500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The spelling of 12507812500 in words is "twelve billion, five hundred seven million, eight hundred twelve thousand, five hundred".