8635458118225 has 81 divisors (see below), whose sum is σ = 11103498046323. Its totient is φ = 6662239856640.

The previous prime is 8635458118223. The next prime is 8635458118237. The reversal of 8635458118225 is 5228118545368.

It is a happy number.

The square root of 8635458118225 is 2938615.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 5386711423041 + 3248746695184 = 2320929^2 + 1802428^2 .

It is not a de Polignac number, because 8635458118225 - 2¹ = 8635458118223 is a prime.

It is a super-2 number, since 2×8635458118225² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8635458118225.

It is not an unprimeable number, because it can be changed into a prime (8635458118223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 89025341377 + ... + 89025341473.

Almost surely, 2^{8635458118225} is an apocalyptic number.

8635458118225 is the 2938615-th square number.

8635458118225 is the 1469308-th centered octagonal number.

It is an amenable number.

8635458118225 is a deficient number, since it is larger than the sum of its proper divisors (2468039928098).

8635458118225 is an frugal number, since it uses more digits than its factorization.

8635458118225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 258 counting only the distinct ones).

The product of its digits is 18432000, while the sum is 58.

The spelling of 8635458118225 in words is "eight trillion, six hundred thirty-five billion, four hundred fifty-eight million, one hundred eighteen thousand, two hundred twenty-five".