25326121728 has 36 divisors (see below), whose sum is σ = 67404419768. Its totient is φ = 8442040320.

The previous prime is 25326121699. The next prime is 25326121771. The reversal of 25326121728 is 82712162352.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16487593 + ... + 16489128.

Almost surely, 2^25326121728 is an apocalyptic number.

It is an amenable number.

25326121728 is an abundant number, since it is smaller than the sum of its proper divisors (42078298040).

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

25326121728 is an equidigital number, since it uses as much as digits as its factorization.

25326121728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32976740 (or 32976726 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The spelling of 25326121728 in words is "twenty-five billion, three hundred twenty-six million, one hundred twenty-one thousand, seven hundred twenty-eight".