6857959631387 has 4 divisors (see below), whose sum is σ = 6887392934760. Its totient is φ = 6828526328016.

The previous prime is 6857959631317. The next prime is 6857959631389. The reversal of 6857959631387 is 7831369597586.

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

It is a cyclic number.

It is not a de Polignac number, because 6857959631387 - 2¹² = 6857959627291 is a prime.

It is a super-2 number, since 2×6857959631387² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6857959631389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14716651337 + ... + 14716651802.

It is an arithmetic number, because the mean of its divisors is an integer number (1721848233690).

Almost surely, 2^{6857959631387} is an apocalyptic number.

6857959631387 is a deficient number, since it is larger than the sum of its proper divisors (29433303373).

6857959631387 is a wasteful number, since it uses less digits than its factorization.

6857959631387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29433303372.

The product of its digits is 2057529600, while the sum is 77.

The spelling of 6857959631387 in words is "six trillion, eight hundred fifty-seven billion, nine hundred fifty-nine million, six hundred thirty-one thousand, three hundred eighty-seven".