8685653779 has 4 divisors (see below), whose sum is σ = 9475258680. Its totient is φ = 7896048880.

The previous prime is 8685653777. The next prime is 8685653797. The reversal of 8685653779 is 9773565868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8685653779 - 2¹ = 8685653777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8685653779.

It is not an unprimeable number, because it can be changed into a prime (8685653771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394802434 + ... + 394802455.

It is an arithmetic number, because the mean of its divisors is an integer number (2368814670).

Almost surely, 2^8685653779 is an apocalyptic number.

8685653779 is a deficient number, since it is larger than the sum of its proper divisors (789604901).

8685653779 is a wasteful number, since it uses less digits than its factorization.

8685653779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789604900.

The product of its digits is 76204800, while the sum is 64.

The square root of 8685653779 is about 93196.8549844897. The cubic root of 8685653779 is about 2055.5789954734.

The spelling of 8685653779 in words is "eight billion, six hundred eighty-five million, six hundred fifty-three thousand, seven hundred seventy-nine".