25228948128 has 48 divisors (see below), whose sum is σ = 66289991040. Its totient is φ = 8401522176.

The previous prime is 25228948099. The next prime is 25228948181. The reversal of 25228948128 is 82184982252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26725 + ... + 226212.

It is an arithmetic number, because the mean of its divisors is an integer number (1381041480).

Almost surely, 2^25228948128 is an apocalyptic number.

It is an amenable number.

25228948128 is an abundant number, since it is smaller than the sum of its proper divisors (41061042912).

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

25228948128 is a wasteful number, since it uses less digits than its factorization.

25228948128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253989 (or 253981 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 51.

The spelling of 25228948128 in words is "twenty-five billion, two hundred twenty-eight million, nine hundred forty-eight thousand, one hundred twenty-eight".