25648167497 has 2 divisors, whose sum is σ = 25648167498. Its totient is φ = 25648167496.

The previous prime is 25648167487. The next prime is 25648167499. The reversal of 25648167497 is 79476184652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21305489296 + 4342678201 = 145964^2 + 65899^2 .

It is a cyclic number.

It is not a de Polignac number, because 25648167497 - 2⁴ = 25648167481 is a prime.

Together with 25648167499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25648167499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12824083748 + 12824083749.

It is an arithmetic number, because the mean of its divisors is an integer number (12824083749).

Almost surely, 2^25648167497 is an apocalyptic number.

It is an amenable number.

25648167497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25648167497 is an equidigital number, since it uses as much as digits as its factorization.

25648167497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 59.

The spelling of 25648167497 in words is "twenty-five billion, six hundred forty-eight million, one hundred sixty-seven thousand, four hundred ninety-seven".