25318808064 has 640 divisors, whose sum is σ = 87114424320. Its totient is φ = 7188480000.

The previous prime is 25318808059. The next prime is 25318808077. The reversal of 25318808064 is 46080881352.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193273279 + ... + 193273409.

It is an arithmetic number, because the mean of its divisors is an integer number (136116288).

Almost surely, 2^25318808064 is an apocalyptic number.

25318808064 is a gapful number since it is divisible by the number (24) 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 25318808064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43557212160).

25318808064 is an abundant number, since it is smaller than the sum of its proper divisors (61795616256).

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

25318808064 is a wasteful number, since it uses less digits than its factorization.

25318808064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 25318808064 in words is "twenty-five billion, three hundred eighteen million, eight hundred eight thousand, sixty-four".