6857653215 has 64 divisors (see below), whose sum is σ = 12891543552. Its totient is φ = 3048192000.

The previous prime is 6857653213. The next prime is 6857653237. The reversal of 6857653215 is 5123567586.

It is not a de Polignac number, because 6857653215 - 2¹ = 6857653213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857653213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 537915 + ... + 550515.

It is an arithmetic number, because the mean of its divisors is an integer number (201430368).

Almost surely, 2^6857653215 is an apocalyptic number.

6857653215 is a deficient number, since it is larger than the sum of its proper divisors (6033890337).

6857653215 is a wasteful number, since it uses less digits than its factorization.

6857653215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12760.

The product of its digits is 1512000, while the sum is 48.

The square root of 6857653215 is about 82810.9486420727. The cubic root of 6857653215 is about 1899.8756349808.

The spelling of 6857653215 in words is "six billion, eight hundred fifty-seven million, six hundred fifty-three thousand, two hundred fifteen".