25395511128 has 256 divisors, whose sum is σ = 71850240000. Its totient is φ = 7429761024.

The previous prime is 25395511123. The next prime is 25395511139. The reversal of 25395511128 is 82111559352.

It is a self number, because there is not a number n which added to its sum of digits gives 25395511128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25395511123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128911126 + ... + 128911322.

It is an arithmetic number, because the mean of its divisors is an integer number (280665000).

Almost surely, 2^25395511128 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 25395511128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35925120000).

25395511128 is an abundant number, since it is smaller than the sum of its proper divisors (46454728872).

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

25395511128 is a wasteful number, since it uses less digits than its factorization.

25395511128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 470 counting only the distinct ones).

The product of its digits is 108000, while the sum is 42.

The spelling of 25395511128 in words is "twenty-five billion, three hundred ninety-five million, five hundred eleven thousand, one hundred twenty-eight".