6857616069 has 24 divisors (see below), whose sum is σ = 9957211992. Its totient is φ = 4547911680.

The previous prime is 6857616061. The next prime is 6857616071. The reversal of 6857616069 is 9606167586.

6857616069 is a `hidden beast` number, since 6 + 8 + 576 + 1 + 6 + 0 + 69 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4265787969 + 2591828100 = 65313^2 + 50910^2 .

It is not a de Polignac number, because 6857616069 - 2³ = 6857616061 is a prime.

It is a super-2 number, since 2×6857616069² = 94053796299614025522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857616061) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1688289 + ... + 1692345.

It is an arithmetic number, because the mean of its divisors is an integer number (414883833).

Almost surely, 2^6857616069 is an apocalyptic number.

It is an amenable number.

6857616069 is a deficient number, since it is larger than the sum of its proper divisors (3099595923).

6857616069 is a wasteful number, since it uses less digits than its factorization.

6857616069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4994 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 6857616069 is about 82810.7243598316. The cubic root of 6857616069 is about 1899.8722046086.

The spelling of 6857616069 in words is "six billion, eight hundred fifty-seven million, six hundred sixteen thousand, sixty-nine".