25130809720 has 64 divisors (see below), whose sum is σ = 57526640640. Its totient is φ = 9878966400.

The previous prime is 25130809687. The next prime is 25130809721. The reversal of 25130809720 is 2790803152.

It is a self number, because there is not a number n which added to its sum of digits gives 25130809720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25130809721) 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, 614305 + ... + 653935.

It is an arithmetic number, because the mean of its divisors is an integer number (898853760).

Almost surely, 2^25130809720 is an apocalyptic number.

25130809720 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 25130809720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28763320320).

25130809720 is an abundant number, since it is smaller than the sum of its proper divisors (32395830920).

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

25130809720 is a wasteful number, since it uses less digits than its factorization.

25130809720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39916 (or 39912 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 25130809720 in words is "twenty-five billion, one hundred thirty million, eight hundred nine thousand, seven hundred twenty".