25257412428 has 12 divisors (see below), whose sum is σ = 58933962360. Its totient is φ = 8419137472.

The previous prime is 25257412361. The next prime is 25257412429. The reversal of 25257412428 is 82421475252.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 25257412428.

It is not an unprimeable number, because it can be changed into a prime (25257412429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052392173 + ... + 1052392196.

It is an arithmetic number, because the mean of its divisors is an integer number (4911163530).

Almost surely, 2^25257412428 is an apocalyptic number.

It is an amenable number.

25257412428 is an abundant number, since it is smaller than the sum of its proper divisors (33676549932).

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

25257412428 is a wasteful number, since it uses less digits than its factorization.

25257412428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104784376 (or 2104784374 counting only the distinct ones).

The product of its digits is 358400, while the sum is 42.

The spelling of 25257412428 in words is "twenty-five billion, two hundred fifty-seven million, four hundred twelve thousand, four hundred twenty-eight".