25609519740 has 576 divisors, whose sum is σ = 94724259840. Its totient is φ = 5125317120.

The previous prime is 25609519693. The next prime is 25609519769. The reversal of 25609519740 is 4791590652.

It is a self number, because there is not a number n which added to its sum of digits gives 25609519740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 39827859 + ... + 39828501.

It is an arithmetic number, because the mean of its divisors is an integer number (164451840).

Almost surely, 2^25609519740 is an apocalyptic number.

25609519740 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 25609519740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47362129920).

25609519740 is an abundant number, since it is smaller than the sum of its proper divisors (69114740100).

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

25609519740 is a wasteful number, since it uses less digits than its factorization.

25609519740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 25609519740 in words is "twenty-five billion, six hundred nine million, five hundred nineteen thousand, seven hundred forty".