25849561608 has 96 divisors (see below), whose sum is σ = 75426536640. Its totient is φ = 7950337920.

The previous prime is 25849561607. The next prime is 25849561613. The reversal of 25849561608 is 80616594852.

25849561608 is a `hidden beast` number, since 2 + 584 + 9 + 56 + 1 + 6 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (25849561607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3057435 + ... + 3065877.

It is an arithmetic number, because the mean of its divisors is an integer number (785693090).

Almost surely, 2^25849561608 is an apocalyptic number.

It is an amenable number.

25849561608 is an abundant number, since it is smaller than the sum of its proper divisors (49576975032).

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

25849561608 is a wasteful number, since it uses less digits than its factorization.

25849561608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739 (or 11732 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 25849561608 in words is "twenty-five billion, eight hundred forty-nine million, five hundred sixty-one thousand, six hundred eight".