25466852921 has 2 divisors, whose sum is σ = 25466852922. Its totient is φ = 25466852920.

The previous prime is 25466852881. The next prime is 25466852923. The reversal of 25466852921 is 12925866452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14679745600 + 10787107321 = 121160^2 + 103861^2 .

It is a cyclic number.

It is not a de Polignac number, because 25466852921 - 2⁶ = 25466852857 is a prime.

Together with 25466852923, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25466852921.

It is not a weakly prime, because it can be changed into another prime (25466852923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12733426460 + 12733426461.

It is an arithmetic number, because the mean of its divisors is an integer number (12733426461).

Almost surely, 2^25466852921 is an apocalyptic number.

It is an amenable number.

25466852921 is a deficient number, since it is larger than the sum of its proper divisors (1).

25466852921 is an equidigital number, since it uses as much as digits as its factorization.

25466852921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 50.

The spelling of 25466852921 in words is "twenty-five billion, four hundred sixty-six million, eight hundred fifty-two thousand, nine hundred twenty-one".