8561389632 has 28 divisors (see below), whose sum is σ = 22652010576. Its totient is φ = 2853796480.

The previous prime is 8561389597. The next prime is 8561389673. The reversal of 8561389632 is 2369831658.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22295094 + ... + 22295477.

Almost surely, 2^8561389632 is an apocalyptic number.

It is an amenable number.

8561389632 is an abundant number, since it is smaller than the sum of its proper divisors (14090620944).

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

8561389632 is a wasteful number, since it uses less digits than its factorization.

8561389632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44590586 (or 44590576 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 8561389632 is about 92527.7776238033. Note that the first 3 decimals coincide. The cubic root of 8561389632 is about 2045.7289328991.

The spelling of 8561389632 in words is "eight billion, five hundred sixty-one million, three hundred eighty-nine thousand, six hundred thirty-two".