25178390328 has 256 divisors, whose sum is σ = 82301184000. Its totient is φ = 6229131264.

The previous prime is 25178390299. The next prime is 25178390339. The reversal of 25178390328 is 82309387152.

It is a happy number.

It is a Cunningham number, because it is equal to 158677²-1.

It is a congruent number.

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, 13328008 + ... + 13329896.

It is an arithmetic number, because the mean of its divisors is an integer number (321489000).

Almost surely, 2^25178390328 is an apocalyptic number.

25178390328 is a gapful number since it is divisible by the number (28) 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 25178390328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41150592000).

25178390328 is an abundant number, since it is smaller than the sum of its proper divisors (57122793672).

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

25178390328 is a wasteful number, since it uses less digits than its factorization.

25178390328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 25178390328 in words is "twenty-five billion, one hundred seventy-eight million, three hundred ninety thousand, three hundred twenty-eight".