25720563353 has 2 divisors, whose sum is σ = 25720563354. Its totient is φ = 25720563352.

The previous prime is 25720563347. The next prime is 25720563373. The reversal of 25720563353 is 35336502752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13613522329 + 12107041024 = 116677^2 + 110032^2 .

It is a cyclic number.

It is not a de Polignac number, because 25720563353 - 2¹⁸ = 25720301209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25720563353.

It is not a weakly prime, because it can be changed into another prime (25720563373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860281676 + 12860281677.

It is an arithmetic number, because the mean of its divisors is an integer number (12860281677).

Almost surely, 2^25720563353 is an apocalyptic number.

It is an amenable number.

25720563353 is a deficient number, since it is larger than the sum of its proper divisors (1).

25720563353 is an equidigital number, since it uses as much as digits as its factorization.

25720563353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 41.

The spelling of 25720563353 in words is "twenty-five billion, seven hundred twenty million, five hundred sixty-three thousand, three hundred fifty-three".