25513403445 has 12 divisors (see below), whose sum is σ = 44223232716. Its totient is φ = 13607148480.

The previous prime is 25513403431. The next prime is 25513403473. The reversal of 25513403445 is 54430431552.

25513403445 is a `hidden beast` number, since 2 + 551 + 34 + 0 + 34 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8179574481 + 17333828964 = 90441^2 + 131658^2 .

It is not a de Polignac number, because 25513403445 - 2¹⁷ = 25513272373 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 283482216 + ... + 283482305.

It is an arithmetic number, because the mean of its divisors is an integer number (3685269393).

Almost surely, 2^25513403445 is an apocalyptic number.

It is an amenable number.

25513403445 is a deficient number, since it is larger than the sum of its proper divisors (18709829271).

25513403445 is a wasteful number, since it uses less digits than its factorization.

25513403445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566964532 (or 566964529 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 25513403445 its reverse (54430431552), we get a palindrome (79943834997).

The spelling of 25513403445 in words is "twenty-five billion, five hundred thirteen million, four hundred three thousand, four hundred forty-five".