8636809716 has 18 divisors (see below), whose sum is σ = 21831935762. Its totient is φ = 2878936560.

The previous prime is 8636809703. The next prime is 8636809717. The reversal of 8636809716 is 6179086368.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8575500816 + 61308900 = 92604^2 + 7830^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8636809717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119955655 + ... + 119955726.

Almost surely, 2^8636809716 is an apocalyptic number.

It is an amenable number.

8636809716 is an abundant number, since it is smaller than the sum of its proper divisors (13195126046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8636809716 is a wasteful number, since it uses less digits than its factorization.

8636809716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239911391 (or 239911386 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 8636809716 is about 92934.4377289711. The cubic root of 8636809716 is about 2051.7185443226.

The spelling of 8636809716 in words is "eight billion, six hundred thirty-six million, eight hundred nine thousand, seven hundred sixteen".