25878318128 has 20 divisors (see below), whose sum is σ = 53996106528. Its totient is φ = 11943839040.

The previous prime is 25878318127. The next prime is 25878318133. The reversal of 25878318128 is 82181387852.

It is a self number, because there is not a number n which added to its sum of digits gives 25878318128.

It is not an unprimeable number, because it can be changed into a prime (25878318127) 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, 62207288 + ... + 62207703.

Almost surely, 2^25878318128 is an apocalyptic number.

It is an amenable number.

25878318128 is an abundant number, since it is smaller than the sum of its proper divisors (28117788400).

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

25878318128 is a wasteful number, since it uses less digits than its factorization.

25878318128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124415012 (or 124415006 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 53.

The spelling of 25878318128 in words is "twenty-five billion, eight hundred seventy-eight million, three hundred eighteen thousand, one hundred twenty-eight".