8638471725 has 48 divisors (see below), whose sum is σ = 15641707200. Its totient is φ = 4180677120.

The previous prime is 8638471711. The next prime is 8638471727. The reversal of 8638471725 is 5271748368.

It is not a de Polignac number, because 8638471725 - 2⁸ = 8638471469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638471727) 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, 17560 + ... + 132609.

It is an arithmetic number, because the mean of its divisors is an integer number (325868900).

Almost surely, 2^8638471725 is an apocalyptic number.

It is an amenable number.

8638471725 is a deficient number, since it is larger than the sum of its proper divisors (7003235475).

8638471725 is a wasteful number, since it uses less digits than its factorization.

8638471725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150254 (or 150249 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 8638471725 is about 92943.3791348260. The cubic root of 8638471725 is about 2051.8501421422.

The spelling of 8638471725 in words is "eight billion, six hundred thirty-eight million, four hundred seventy-one thousand, seven hundred twenty-five".