25043020417 has 2 divisors, whose sum is σ = 25043020418. Its totient is φ = 25043020416.

The previous prime is 25043020369. The next prime is 25043020469. The reversal of 25043020417 is 71402034052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23900850801 + 1142169616 = 154599^2 + 33796^2 .

It is a cyclic number.

It is not a de Polignac number, because 25043020417 - 2¹⁵ = 25042987649 is a prime.

It is not a weakly prime, because it can be changed into another prime (25043020477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12521510208 + 12521510209.

It is an arithmetic number, because the mean of its divisors is an integer number (12521510209).

Almost surely, 2^25043020417 is an apocalyptic number.

It is an amenable number.

25043020417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25043020417 is an equidigital number, since it uses as much as digits as its factorization.

25043020417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

Adding to 25043020417 its reverse (71402034052), we get a palindrome (96445054469).

The spelling of 25043020417 in words is "twenty-five billion, forty-three million, twenty thousand, four hundred seventeen".