8418639225 has 48 divisors (see below), whose sum is σ = 14852273600. Its totient is φ = 4195307520.

The previous prime is 8418639223. The next prime is 8418639253. The reversal of 8418639225 is 5229368148.

It is not a de Polignac number, because 8418639225 - 2¹ = 8418639223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8418639221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63561 + ... + 144489.

Almost surely, 2^8418639225 is an apocalyptic number.

It is an amenable number.

8418639225 is a deficient number, since it is larger than the sum of its proper divisors (6433634375).

8418639225 is a wasteful number, since it uses less digits than its factorization.

8418639225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81034 (or 81029 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 8418639225 is about 91753.1428617026. The cubic root of 8418639225 is about 2034.2951616493.

The spelling of 8418639225 in words is "eight billion, four hundred eighteen million, six hundred thirty-nine thousand, two hundred twenty-five".