25025015028 has 72 divisors (see below), whose sum is σ = 64265740896. Its totient is φ = 7573737600.

The previous prime is 25025015021. The next prime is 25025015047. The reversal of 25025015028 is 82051052052.

It is a junction number, because it is equal to n+sod(n) for n = 25025014986 and 25025015004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025015021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22563 + ... + 224853.

Almost surely, 2^25025015028 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 25025015028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32132870448).

25025015028 is an abundant number, since it is smaller than the sum of its proper divisors (39240725868).

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

25025015028 is a wasteful number, since it uses less digits than its factorization.

25025015028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202385 (or 202370 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 25025015028 in words is "twenty-five billion, twenty-five million, fifteen thousand, twenty-eight".