25421053413205 has 32 divisors (see below), whose sum is σ = 31297198141440. Its totient is φ = 19810427857920.

The previous prime is 25421053413169. The next prime is 25421053413277. The reversal of 25421053413205 is 50231435012452.

It is a happy number.

It is not a de Polignac number, because 25421053413205 - 2⁹ = 25421053412693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418636836 + ... + 418697554.

It is an arithmetic number, because the mean of its divisors is an integer number (978037441920).

Almost surely, 2^{25421053413205} is an apocalyptic number.

It is an amenable number.

25421053413205 is a deficient number, since it is larger than the sum of its proper divisors (5876144728235).

25421053413205 is a wasteful number, since it uses less digits than its factorization.

25421053413205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63861.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 25421053413205 its reverse (50231435012452), we get a palindrome (75652488425657).

The spelling of 25421053413205 in words is "twenty-five trillion, four hundred twenty-one billion, fifty-three million, four hundred thirteen thousand, two hundred five".