25125104509 has 2 divisors, whose sum is σ = 25125104510. Its totient is φ = 25125104508.

The previous prime is 25125104503. The next prime is 25125104567. The reversal of 25125104509 is 90540152152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15971398884 + 9153705625 = 126378^2 + 95675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25125104509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25125104503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12562552254 + 12562552255.

It is an arithmetic number, because the mean of its divisors is an integer number (12562552255).

Almost surely, 2^25125104509 is an apocalyptic number.

It is an amenable number.

25125104509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25125104509 is an equidigital number, since it uses as much as digits as its factorization.

25125104509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 25125104509 in words is "twenty-five billion, one hundred twenty-five million, one hundred four thousand, five hundred nine".