25825634240 has 168 divisors, whose sum is σ = 71730382320. Its totient is φ = 8830660608.

The previous prime is 25825634207. The next prime is 25825634251. The reversal of 25825634240 is 4243652852.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6411107 + ... + 6415133.

Almost surely, 2^25825634240 is an apocalyptic number.

25825634240 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 25825634240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35865191160).

25825634240 is an abundant number, since it is smaller than the sum of its proper divisors (45904748080).

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

25825634240 is a wasteful number, since it uses less digits than its factorization.

25825634240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 25825634240 in words is "twenty-five billion, eight hundred twenty-five million, six hundred thirty-four thousand, two hundred forty".