7685685385 has 16 divisors (see below), whose sum is σ = 10880381952. Its totient is φ = 5100177600.

The previous prime is 7685685379. The next prime is 7685685391. The reversal of 7685685385 is 5835865867.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7685685379) and next prime (7685685391).

It is not a de Polignac number, because 7685685385 - 2⁷ = 7685685257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3540706 + ... + 3542875.

It is an arithmetic number, because the mean of its divisors is an integer number (680023872).

Almost surely, 2^7685685385 is an apocalyptic number.

It is an amenable number.

7685685385 is a deficient number, since it is larger than the sum of its proper divisors (3194696567).

7685685385 is a wasteful number, since it uses less digits than its factorization.

7685685385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083624.

The product of its digits is 48384000, while the sum is 61.

The square root of 7685685385 is about 87668.0408415746. The cubic root of 7685685385 is about 1973.4563923332.

The spelling of 7685685385 in words is "seven billion, six hundred eighty-five million, six hundred eighty-five thousand, three hundred eighty-five".