25210606081 has 2 divisors, whose sum is σ = 25210606082. Its totient is φ = 25210606080.

The previous prime is 25210606051. The next prime is 25210606097. The reversal of 25210606081 is 18060601252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16662679056 + 8547927025 = 129084^2 + 92455^2 .

It is a cyclic number.

It is not a de Polignac number, because 25210606081 - 2⁵ = 25210606049 is a prime.

It is a super-2 number, since 2×25210606081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25210606051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12605303040 + 12605303041.

It is an arithmetic number, because the mean of its divisors is an integer number (12605303041).

Almost surely, 2^25210606081 is an apocalyptic number.

It is an amenable number.

25210606081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25210606081 is an equidigital number, since it uses as much as digits as its factorization.

25210606081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 25210606081 in words is "twenty-five billion, two hundred ten million, six hundred six thousand, eighty-one".