25609328140 has 72 divisors (see below), whose sum is σ = 59777796960. Its totient is φ = 9207770880.

The previous prime is 25609328123. The next prime is 25609328141. The reversal of 25609328140 is 4182390652.

It is a junction number, because it is equal to n+sod(n) for n = 25609328093 and 25609328102.

It is not an unprimeable number, because it can be changed into a prime (25609328141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155929 + ... + 274831.

It is an arithmetic number, because the mean of its divisors is an integer number (830247180).

Almost surely, 2^25609328140 is an apocalyptic number.

25609328140 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 25609328140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29888898480).

25609328140 is an abundant number, since it is smaller than the sum of its proper divisors (34168468820).

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

25609328140 is a wasteful number, since it uses less digits than its factorization.

25609328140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119023 (or 119010 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 25609328140 in words is "twenty-five billion, six hundred nine million, three hundred twenty-eight thousand, one hundred forty".