25373104609 has 2 divisors, whose sum is σ = 25373104610. Its totient is φ = 25373104608.

The previous prime is 25373104577. The next prime is 25373104661. The reversal of 25373104609 is 90640137352.

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., 20731680225 + 4641424384 = 143985^2 + 68128^2 .

It is a cyclic number.

It is not a de Polignac number, because 25373104609 - 2⁵ = 25373104577 is a prime.

It is not a weakly prime, because it can be changed into another prime (25373107609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12686552304 + 12686552305.

It is an arithmetic number, because the mean of its divisors is an integer number (12686552305).

Almost surely, 2^25373104609 is an apocalyptic number.

It is an amenable number.

25373104609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25373104609 is an equidigital number, since it uses as much as digits as its factorization.

25373104609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 25373104609 in words is "twenty-five billion, three hundred seventy-three million, one hundred four thousand, six hundred nine".