25445453654417 has 2 divisors, whose sum is σ = 25445453654418. Its totient is φ = 25445453654416.

The previous prime is 25445453654381. The next prime is 25445453654449. The reversal of 25445453654417 is 71445635454452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24486622972816 + 958830681601 = 4948396^2 + 979199^2 .

It is a cyclic number.

It is not a de Polignac number, because 25445453654417 - 2¹⁰ = 25445453653393 is a prime.

It is a super-2 number, since 2×25445453654417² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25445453654917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722726827208 + 12722726827209.

It is an arithmetic number, because the mean of its divisors is an integer number (12722726827209).

Almost surely, 2^{25445453654417} is an apocalyptic number.

It is an amenable number.

25445453654417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25445453654417 is an equidigital number, since it uses as much as digits as its factorization.

25445453654417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280000, while the sum is 59.

The spelling of 25445453654417 in words is "twenty-five trillion, four hundred forty-five billion, four hundred fifty-three million, six hundred fifty-four thousand, four hundred seventeen".