25645997723 has 2 divisors, whose sum is σ = 25645997724. Its totient is φ = 25645997722.

The previous prime is 25645997677. The next prime is 25645997753. The reversal of 25645997723 is 32779954652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25645997723 - 2⁶ = 25645997659 is a prime.

It is not a weakly prime, because it can be changed into another prime (25645997753) 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, 12822998861 + 12822998862.

It is an arithmetic number, because the mean of its divisors is an integer number (12822998862).

Almost surely, 2^25645997723 is an apocalyptic number.

25645997723 is a deficient number, since it is larger than the sum of its proper divisors (1).

25645997723 is an equidigital number, since it uses as much as digits as its factorization.

25645997723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28576800, while the sum is 59.

The spelling of 25645997723 in words is "twenty-five billion, six hundred forty-five million, nine hundred ninety-seven thousand, seven hundred twenty-three".