2500812500 has 42 divisors (see below), whose sum is σ = 5470594038. Its totient is φ = 1000300000.

The previous prime is 2500812497. The next prime is 2500812521. The reversal of 2500812500 is 52180052.

It can be written as a sum of positive squares in 7 ways, for example, as 2489211664 + 11600836 = 49892^2 + 3406^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 42494 + ... + 82506.

It is an arithmetic number, because the mean of its divisors is an integer number (130252239).

Almost surely, 2^2500812500 is an apocalyptic number.

2500812500 is a gapful number since it is divisible by the number (20) 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 2500812500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2735297019).

2500812500 is an abundant number, since it is smaller than the sum of its proper divisors (2969781538).

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

2500812500 is an frugal number, since it uses more digits than its factorization.

2500812500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40047 (or 40020 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2500812500 is about 50008.1243399510. The cubic root of 2500812500 is about 1357.3558233262.

Adding to 2500812500 its reverse (52180052), we get a palindrome (2552992552).

The spelling of 2500812500 in words is "two billion, five hundred million, eight hundred twelve thousand, five hundred".