25800245773 has 2 divisors, whose sum is σ = 25800245774. Its totient is φ = 25800245772.

The previous prime is 25800245761. The next prime is 25800245803. The reversal of 25800245773 is 37754200852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23267841444 + 2532404329 = 152538^2 + 50323^2 .

It is a cyclic number.

It is not a de Polignac number, because 25800245773 - 2²⁹ = 25263374861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25800245873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900122886 + 12900122887.

It is an arithmetic number, because the mean of its divisors is an integer number (12900122887).

Almost surely, 2^25800245773 is an apocalyptic number.

It is an amenable number.

25800245773 is a deficient number, since it is larger than the sum of its proper divisors (1).

25800245773 is an equidigital number, since it uses as much as digits as its factorization.

25800245773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 25800245773 in words is "twenty-five billion, eight hundred million, two hundred forty-five thousand, seven hundred seventy-three".