25205621044 has 12 divisors (see below), whose sum is σ = 44857461600. Its totient is φ = 12389203448.

The previous prime is 25205621029. The next prime is 25205621053. The reversal of 25205621044 is 44012650252.

It is a junction number, because it is equal to n+sod(n) for n = 25205620997 and 25205621015.

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 3 ways as a sum of consecutive naturals, for example, 53401504 + ... + 53401975.

It is an arithmetic number, because the mean of its divisors is an integer number (3738121800).

Almost surely, 2^25205621044 is an apocalyptic number.

It is an amenable number.

25205621044 is a deficient number, since it is larger than the sum of its proper divisors (19651840556).

25205621044 is a wasteful number, since it uses less digits than its factorization.

25205621044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106803542 (or 106803540 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 25205621044 in words is "twenty-five billion, two hundred five million, six hundred twenty-one thousand, forty-four".