25588081530 has 96 divisors (see below), whose sum is σ = 72611106048. Its totient is φ = 6200265600.

The previous prime is 25588081513. The next prime is 25588081579. The reversal of 25588081530 is 3518088552.

25588081530 is a `hidden beast` number, since 2 + 558 + 80 + 8 + 15 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2734660 + ... + 2744000.

It is an arithmetic number, because the mean of its divisors is an integer number (756365688).

Almost surely, 2^25588081530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25588081530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36305553024).

25588081530 is an abundant number, since it is smaller than the sum of its proper divisors (47023024518).

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

25588081530 is a wasteful number, since it uses less digits than its factorization.

25588081530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12132 (or 12129 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 25588081530 in words is "twenty-five billion, five hundred eighty-eight million, eighty-one thousand, five hundred thirty".