6385632685 has 4 divisors (see below), whose sum is σ = 7662759228. Its totient is φ = 5108506144.

The previous prime is 6385632677. The next prime is 6385632697. The reversal of 6385632685 is 5862365836.

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 2633947684 + 3751685001 = 51322^2 + 61251^2 .

It is a cyclic number.

It is not a de Polignac number, because 6385632685 - 2³ = 6385632677 is a prime.

It is a Duffinian number.

It is a congruent 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, 638563264 + ... + 638563273.

It is an arithmetic number, because the mean of its divisors is an integer number (1915689807).

Almost surely, 2^6385632685 is an apocalyptic number.

It is an amenable number.

6385632685 is a deficient number, since it is larger than the sum of its proper divisors (1277126543).

6385632685 is a wasteful number, since it uses less digits than its factorization.

6385632685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277126542.

The product of its digits is 6220800, while the sum is 52.

The square root of 6385632685 is about 79910.1538291599. The cubic root of 6385632685 is about 1855.2451765065.

The spelling of 6385632685 in words is "six billion, three hundred eighty-five million, six hundred thirty-two thousand, six hundred eighty-five".