25254441405 has 12 divisors (see below), whose sum is σ = 43774365180. Its totient is φ = 13469035392.

The previous prime is 25254441379. The next prime is 25254441437. The reversal of 25254441405 is 50414445252.

It can be written as a sum of positive squares in 2 ways, for example, as 8827917849 + 16426523556 = 93957^2 + 128166^2 .

It is not a de Polignac number, because 25254441405 - 2¹⁶ = 25254375869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25254441405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280604860 + ... + 280604949.

It is an arithmetic number, because the mean of its divisors is an integer number (3647863765).

Almost surely, 2^25254441405 is an apocalyptic number.

It is an amenable number.

25254441405 is a deficient number, since it is larger than the sum of its proper divisors (18519923775).

25254441405 is a wasteful number, since it uses less digits than its factorization.

25254441405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561209820 (or 561209817 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 25254441405 its reverse (50414445252), we get a palindrome (75668886657).

The spelling of 25254441405 in words is "twenty-five billion, two hundred fifty-four million, four hundred forty-one thousand, four hundred five".