25561044 has 36 divisors (see below), whose sum is σ = 65991744. Its totient is φ = 8338512.

The previous prime is 25561033. The next prime is 25561051. The reversal of 25561044 is 44016552.

25561044 is a `hidden beast` number, since 2 + 5 + 5 + 610 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×25561044³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25560999 and 25561017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5862 + ... + 9245.

It is an arithmetic number, because the mean of its divisors is an integer number (1833104).

Almost surely, 2^25561044 is an apocalyptic number.

It is an amenable number.

25561044 is an abundant number, since it is smaller than the sum of its proper divisors (40430700).

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

25561044 is a wasteful number, since it uses less digits than its factorization.

25561044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15164 (or 15159 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25561044 is about 5055.7931128558. The cubic root of 25561044 is about 294.5729490691.

Adding to 25561044 its reverse (44016552), we get a palindrome (69577596).

It can be divided in two parts, 2556 and 1044, that added together give a square (3600 = 60²).

The spelling of 25561044 in words is "twenty-five million, five hundred sixty-one thousand, forty-four".