25605654606 has 64 divisors (see below), whose sum is σ = 65261928960. Its totient is φ = 7289835840.

The previous prime is 25605654533. The next prime is 25605654617. The reversal of 25605654606 is 60645650652.

It is a happy number.

25605654606 is a `hidden beast` number, since 2 + 56 + 0 + 56 + 546 + 0 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14316 + ... + 226751.

It is an arithmetic number, because the mean of its divisors is an integer number (1019717640).

Almost surely, 2^25605654606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25605654606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32630964480).

25605654606 is an abundant number, since it is smaller than the sum of its proper divisors (39656274354).

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

25605654606 is a wasteful number, since it uses less digits than its factorization.

25605654606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241366 (or 241360 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 25605654606 in words is "twenty-five billion, six hundred five million, six hundred fifty-four thousand, six hundred six".