25933645321 has 8 divisors (see below), whose sum is σ = 26644375944. Its totient is φ = 25223431680.

The previous prime is 25933645313. The next prime is 25933645343. The reversal of 25933645321 is 12354633952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13470155721 + 12463489600 = 116061^2 + 111640^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25933645321 - 2³ = 25933645313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25933645301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26440 + ... + 229273.

It is an arithmetic number, because the mean of its divisors is an integer number (3330546993).

Almost surely, 2^25933645321 is an apocalyptic number.

It is an amenable number.

25933645321 is a deficient number, since it is larger than the sum of its proper divisors (710730623).

25933645321 is a wasteful number, since it uses less digits than its factorization.

25933645321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258491.

The product of its digits is 583200, while the sum is 43.

The spelling of 25933645321 in words is "twenty-five billion, nine hundred thirty-three million, six hundred forty-five thousand, three hundred twenty-one".