8709831645 has 16 divisors (see below), whose sum is σ = 13936923072. Its totient is φ = 4644846080.

The previous prime is 8709831631. The next prime is 8709831701. The reversal of 8709831645 is 5461389078.

It is not a de Polignac number, because 8709831645 - 2¹⁸ = 8709569501 is a prime.

It is a super-2 number, since 2×8709831645² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266605 + ... + 297485.

It is an arithmetic number, because the mean of its divisors is an integer number (871057692).

Almost surely, 2^8709831645 is an apocalyptic number.

It is an amenable number.

8709831645 is a deficient number, since it is larger than the sum of its proper divisors (5227091427).

8709831645 is a wasteful number, since it uses less digits than its factorization.

8709831645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49692.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 8709831645 is about 93326.4787988918. The cubic root of 8709831645 is about 2057.4845695198.

The spelling of 8709831645 in words is "eight billion, seven hundred nine million, eight hundred thirty-one thousand, six hundred forty-five".