25555025009 has 2 divisors, whose sum is σ = 25555025010. Its totient is φ = 25555025008.

The previous prime is 25555024997. The next prime is 25555025021. The reversal of 25555025009 is 90052055552.

It is a balanced prime because it is at equal distance from previous prime (25555024997) and next prime (25555025021).

It can be written as a sum of positive squares in only one way, i.e., 22718929984 + 2836095025 = 150728^2 + 53255^2 .

It is a cyclic number.

It is not a de Polignac number, because 25555025009 - 2²⁰ = 25553976433 is a prime.

It is not a weakly prime, because it can be changed into another prime (25555024009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777512504 + 12777512505.

It is an arithmetic number, because the mean of its divisors is an integer number (12777512505).

Almost surely, 2^25555025009 is an apocalyptic number.

It is an amenable number.

25555025009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555025009 is an equidigital number, since it uses as much as digits as its factorization.

25555025009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 25555025009 in words is "twenty-five billion, five hundred fifty-five million, twenty-five thousand, nine".