8638228756971 has 12 divisors (see below), whose sum is σ = 13611754405080. Its totient is φ = 5235290155680.

The previous prime is 8638228756873. The next prime is 8638228757033. The reversal of 8638228756971 is 1796578228368.

8638228756971 is a `hidden beast` number, since 8 + 6 + 38 + 2 + 28 + 7 + 569 + 7 + 1 = 666.

It is not a de Polignac number, because 8638228756971 - 2¹⁴ = 8638228740587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8638228756971.

It is not an unprimeable number, because it can be changed into a prime (8638228356971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43627417866 + ... + 43627418063.

It is an arithmetic number, because the mean of its divisors is an integer number (1134312867090).

Almost surely, 2^{8638228756971} is an apocalyptic number.

8638228756971 is a deficient number, since it is larger than the sum of its proper divisors (4973525648109).

8638228756971 is a wasteful number, since it uses less digits than its factorization.

8638228756971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87254835946 (or 87254835943 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 72.

The spelling of 8638228756971 in words is "eight trillion, six hundred thirty-eight billion, two hundred twenty-eight million, seven hundred fifty-six thousand, nine hundred seventy-one".