25621460328 has 128 divisors (see below), whose sum is σ = 72783360000. Its totient is φ = 7472247552.

The previous prime is 25621460303. The next prime is 25621460341. The reversal of 25621460328 is 82306412652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262033 + ... + 346271.

It is an arithmetic number, because the mean of its divisors is an integer number (568620000).

Almost surely, 2^25621460328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25621460328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36391680000).

25621460328 is an abundant number, since it is smaller than the sum of its proper divisors (47161899672).

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

25621460328 is a wasteful number, since it uses less digits than its factorization.

25621460328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84319 (or 84315 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 25621460328 in words is "twenty-five billion, six hundred twenty-one million, four hundred sixty thousand, three hundred twenty-eight".