8638712855 has 16 divisors (see below), whose sum is σ = 10400724000. Its totient is φ = 6888161280.

The previous prime is 8638712827. The next prime is 8638712861. The reversal of 8638712855 is 5582178368.

It is a de Polignac number, because none of the positive numbers 2^k-8638712855 is a prime.

It is a super-2 number, since 2×8638712855² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8638712797 and 8638712806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3161840 + ... + 3164570.

It is an arithmetic number, because the mean of its divisors is an integer number (650045250).

Almost surely, 2^8638712855 is an apocalyptic number.

8638712855 is a deficient number, since it is larger than the sum of its proper divisors (1762011145).

8638712855 is a wasteful number, since it uses less digits than its factorization.

8638712855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594.

The product of its digits is 3225600, while the sum is 53.

The square root of 8638712855 is about 92944.6763133855. The cubic root of 8638712855 is about 2051.8692334057.

The spelling of 8638712855 in words is "eight billion, six hundred thirty-eight million, seven hundred twelve thousand, eight hundred fifty-five".