8638509275 has 24 divisors (see below), whose sum is σ = 11826368064. Its totient is φ = 6206842400.

The previous prime is 8638509247. The next prime is 8638509323. The reversal of 8638509275 is 5729058368.

It is a de Polignac number, because none of the positive numbers 2^k-8638509275 is a prime.

It is a super-2 number, since 2×8638509275² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166409 + ... + 212058.

It is an arithmetic number, because the mean of its divisors is an integer number (492765336).

Almost surely, 2^8638509275 is an apocalyptic number.

8638509275 is a deficient number, since it is larger than the sum of its proper divisors (3187858789).

8638509275 is a wasteful number, since it uses less digits than its factorization.

8638509275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378571 (or 378566 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The square root of 8638509275 is about 92943.5811393127. The cubic root of 8638509275 is about 2051.8531151550.

The spelling of 8638509275 in words is "eight billion, six hundred thirty-eight million, five hundred nine thousand, two hundred seventy-five".