25268275621 has 8 divisors (see below), whose sum is σ = 26153317080. Its totient is φ = 24384148992.

The previous prime is 25268275589. The next prime is 25268275649. The reversal of 25268275621 is 12657286252.

It can be written as a sum of positive squares in 4 ways, for example, as 10933002721 + 14335272900 = 104561^2 + 119730^2 .

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 25268275621 - 2⁵ = 25268275589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25268275651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 172260 + ... + 283213.

It is an arithmetic number, because the mean of its divisors is an integer number (3269164635).

Almost surely, 2^25268275621 is an apocalyptic number.

It is an amenable number.

25268275621 is a deficient number, since it is larger than the sum of its proper divisors (885041459).

25268275621 is a wasteful number, since it uses less digits than its factorization.

25268275621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457415.

The product of its digits is 806400, while the sum is 46.

The spelling of 25268275621 in words is "twenty-five billion, two hundred sixty-eight million, two hundred seventy-five thousand, six hundred twenty-one".