8686635505 has 4 divisors (see below), whose sum is σ = 10423962612. Its totient is φ = 6949308400.

The previous prime is 8686635493. The next prime is 8686635539. The reversal of 8686635505 is 5055366868.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4314913344 + 4371722161 = 65688^2 + 66119^2 .

It is not a de Polignac number, because 8686635505 - 2²¹ = 8684538353 is a prime.

It is a Duffinian 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, 868663546 + ... + 868663555.

It is an arithmetic number, because the mean of its divisors is an integer number (2605990653).

Almost surely, 2^8686635505 is an apocalyptic number.

It is an amenable number.

8686635505 is a deficient number, since it is larger than the sum of its proper divisors (1737327107).

8686635505 is a wasteful number, since it uses less digits than its factorization.

8686635505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737327106.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The square root of 8686635505 is about 93202.1217837877. The cubic root of 8686635505 is about 2055.6564388596.

The spelling of 8686635505 in words is "eight billion, six hundred eighty-six million, six hundred thirty-five thousand, five hundred five".