25171447201 has 2 divisors, whose sum is σ = 25171447202. Its totient is φ = 25171447200.

The previous prime is 25171447193. The next prime is 25171447211. The reversal of 25171447201 is 10274417152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22440339601 + 2731107600 = 149801^2 + 52260^2 .

It is a cyclic number.

It is not a de Polignac number, because 25171447201 - 2³ = 25171447193 is a prime.

It is not a weakly prime, because it can be changed into another prime (25171447211) 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, 12585723600 + 12585723601.

It is an arithmetic number, because the mean of its divisors is an integer number (12585723601).

Almost surely, 2^25171447201 is an apocalyptic number.

It is an amenable number.

25171447201 is a deficient number, since it is larger than the sum of its proper divisors (1).

25171447201 is an equidigital number, since it uses as much as digits as its factorization.

25171447201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The spelling of 25171447201 in words is "twenty-five billion, one hundred seventy-one million, four hundred forty-seven thousand, two hundred one".