25720563373 has 2 divisors, whose sum is σ = 25720563374. Its totient is φ = 25720563372.

The previous prime is 25720563353. The next prime is 25720563409. The reversal of 25720563373 is 37336502752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19003449609 + 6717113764 = 137853^2 + 81958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25720563373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25720563353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860281686 + 12860281687.

It is an arithmetic number, because the mean of its divisors is an integer number (12860281687).

Almost surely, 2^25720563373 is an apocalyptic number.

It is an amenable number.

25720563373 is a deficient number, since it is larger than the sum of its proper divisors (1).

25720563373 is an equidigital number, since it uses as much as digits as its factorization.

25720563373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 43.

The spelling of 25720563373 in words is "twenty-five billion, seven hundred twenty million, five hundred sixty-three thousand, three hundred seventy-three".