25166032417 has 2 divisors, whose sum is σ = 25166032418. Its totient is φ = 25166032416.

The previous prime is 25166032391. The next prime is 25166032477. The reversal of 25166032417 is 71423066152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13015159056 + 12150873361 = 114084^2 + 110231^2 .

It is a cyclic number.

It is not a de Polignac number, because 25166032417 - 2¹¹ = 25166030369 is a prime.

It is a super-2 number, since 2×25166032417² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25166032477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12583016208 + 12583016209.

It is an arithmetic number, because the mean of its divisors is an integer number (12583016209).

Almost surely, 2^25166032417 is an apocalyptic number.

It is an amenable number.

25166032417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25166032417 is an equidigital number, since it uses as much as digits as its factorization.

25166032417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 25166032417 its reverse (71423066152), we get a palindrome (96589098569).

The spelling of 25166032417 in words is "twenty-five billion, one hundred sixty-six million, thirty-two thousand, four hundred seventeen".