25542694908 has 72 divisors (see below), whose sum is σ = 66118852800. Its totient is φ = 8311919616.

The previous prime is 25542694889. The next prime is 25542694909. The reversal of 25542694908 is 80949624552.

25542694908 is a `hidden beast` number, since 2 + 5 + 542 + 6 + 9 + 4 + 90 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25542694909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202660 + ... + 303572.

It is an arithmetic number, because the mean of its divisors is an integer number (918317400).

Almost surely, 2^25542694908 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 25542694908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33059426400).

25542694908 is an abundant number, since it is smaller than the sum of its proper divisors (40576157892).

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

25542694908 is a wasteful number, since it uses less digits than its factorization.

25542694908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101091 (or 101086 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 25542694908 in words is "twenty-five billion, five hundred forty-two million, six hundred ninety-four thousand, nine hundred eight".