25909484421 has 8 divisors (see below), whose sum is σ = 34549122400. Its totient is φ = 17271418032.

The previous prime is 25909484399. The next prime is 25909484431. The reversal of 25909484421 is 12448490952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25909484421 - 2⁹ = 25909483909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25909484431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353875 + ... + 420768.

It is an arithmetic number, because the mean of its divisors is an integer number (4318640300).

Almost surely, 2^25909484421 is an apocalyptic number.

It is an amenable number.

25909484421 is a deficient number, since it is larger than the sum of its proper divisors (8639637979).

25909484421 is a wasteful number, since it uses less digits than its factorization.

25909484421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785795.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 25909484421 in words is "twenty-five billion, nine hundred nine million, four hundred eighty-four thousand, four hundred twenty-one".