2500040000 has 70 divisors (see below), whose sum is σ = 6199385874. Its totient is φ = 1000000000.

The previous prime is 2500039987. The next prime is 2500040003. The reversal of 2500040000 is 400052.

It can be written as a sum of positive squares in 5 ways, for example, as 201412864 + 2298627136 = 14192^2 + 47944^2 .

It is a sliding number, since 2500040000 = 40000 + 2500000000 and 1/40000 + 1/2500000000 = 0.00002500040000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500040003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8750 + ... + 71250.

Almost surely, 2^2500040000 is an apocalyptic number.

2500040000 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 2500040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3099692937).

2500040000 is an abundant number, since it is smaller than the sum of its proper divisors (3699345874).

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

2500040000 is an frugal number, since it uses more digits than its factorization.

2500040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62533 (or 62508 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 2500040000 is about 50000.3999984000. The cubic root of 2500040000 is about 1357.2160467058.

Adding to 2500040000 its reverse (400052), we get a palindrome (2500440052).

It can be divided in two parts, 25000 and 40000, that multiplied together give a 9-th power (1000000000 = 10⁹).

The spelling of 2500040000 in words is "two billion, five hundred million, forty thousand".