25805380001 has 2 divisors, whose sum is σ = 25805380002. Its totient is φ = 25805380000.

The previous prime is 25805379997. The next prime is 25805380049. The reversal of 25805380001 is 10008350852.

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., 23122243600 + 2683136401 = 152060^2 + 51799^2 .

It is a cyclic number.

It is not a de Polignac number, because 25805380001 - 2² = 25805379997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25805380001.

It is not a weakly prime, because it can be changed into another prime (25805380801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902690000 + 12902690001.

It is an arithmetic number, because the mean of its divisors is an integer number (12902690001).

Almost surely, 2^25805380001 is an apocalyptic number.

It is an amenable number.

25805380001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25805380001 is an equidigital number, since it uses as much as digits as its factorization.

25805380001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 25805380001 in words is "twenty-five billion, eight hundred five million, three hundred eighty thousand, one".