25710219989 has 2 divisors, whose sum is σ = 25710219990. Its totient is φ = 25710219988.

The previous prime is 25710219947. The next prime is 25710220001. The reversal of 25710219989 is 98991201752.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22434947089 + 3275272900 = 149783^2 + 57230^2 .

It is a cyclic number.

It is not a de Polignac number, because 25710219989 - 2²⁰ = 25709171413 is a prime.

It is a super-2 number, since 2×25710219989² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25710219989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25710210989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12855109994 + 12855109995.

It is an arithmetic number, because the mean of its divisors is an integer number (12855109995).

Almost surely, 2^25710219989 is an apocalyptic number.

It is an amenable number.

25710219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25710219989 is an equidigital number, since it uses as much as digits as its factorization.

25710219989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 25710219989 in words is "twenty-five billion, seven hundred ten million, two hundred nineteen thousand, nine hundred eighty-nine".