8632639689 has 16 divisors (see below), whose sum is σ = 11564795904. Its totient is φ = 5727834000.

The previous prime is 8632639591. The next prime is 8632639727. The reversal of 8632639689 is 9869362368.

It is not a de Polignac number, because 8632639689 - 2¹¹ = 8632637641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8632639489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849412 + ... + 859514.

It is an arithmetic number, because the mean of its divisors is an integer number (722799744).

Almost surely, 2^8632639689 is an apocalyptic number.

It is an amenable number.

8632639689 is a deficient number, since it is larger than the sum of its proper divisors (2932156215).

8632639689 is a wasteful number, since it uses less digits than its factorization.

8632639689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11428.

The product of its digits is 20155392, while the sum is 60.

The square root of 8632639689 is about 92911.9997040210. Note that the first 3 decimals coincide. The cubic root of 8632639689 is about 2051.3882873823.

The spelling of 8632639689 in words is "eight billion, six hundred thirty-two million, six hundred thirty-nine thousand, six hundred eighty-nine".