25381600128 has 80 divisors (see below), whose sum is σ = 75535261560. Its totient is φ = 8460529920.

The previous prime is 25381600093. The next prime is 25381600133. The reversal of 25381600128 is 82100618352.

It is a happy number.

25381600128 is a `hidden beast` number, since 2 + 5 + 38 + 1 + 600 + 12 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25381600092 and 25381600101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1213668 + ... + 1234403.

Almost surely, 2^25381600128 is an apocalyptic number.

It is an amenable number.

25381600128 is an abundant number, since it is smaller than the sum of its proper divisors (50153661432).

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

25381600128 is an equidigital number, since it uses as much as digits as its factorization.

25381600128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448097 (or 2448076 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 25381600128 in words is "twenty-five billion, three hundred eighty-one million, six hundred thousand, one hundred twenty-eight".