25665850253 has 2 divisors, whose sum is σ = 25665850254. Its totient is φ = 25665850252.

The previous prime is 25665850219. The next prime is 25665850291. The reversal of 25665850253 is 35205856652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24568054564 + 1097795689 = 156742^2 + 33133^2 .

It is a cyclic number.

It is not a de Polignac number, because 25665850253 - 2⁸ = 25665849997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25665850198 and 25665850207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25665850153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832925126 + 12832925127.

It is an arithmetic number, because the mean of its divisors is an integer number (12832925127).

Almost surely, 2^25665850253 is an apocalyptic number.

It is an amenable number.

25665850253 is a deficient number, since it is larger than the sum of its proper divisors (1).

25665850253 is an equidigital number, since it uses as much as digits as its factorization.

25665850253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 25665850253 in words is "twenty-five billion, six hundred sixty-five million, eight hundred fifty thousand, two hundred fifty-three".