6855172752868 has 12 divisors (see below), whose sum is σ = 13087147982832. Its totient is φ = 3115987614920.

The previous prime is 6855172752863. The next prime is 6855172752877. The reversal of 6855172752868 is 8682572715586.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6855172752797 and 6855172752806.

It is not an unprimeable number, because it can be changed into a prime (6855172752863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77899690330 + ... + 77899690417.

It is an arithmetic number, because the mean of its divisors is an integer number (1090595665236).

Almost surely, 2^{6855172752868} is an apocalyptic number.

It is an amenable number.

6855172752868 is a deficient number, since it is larger than the sum of its proper divisors (6231975229964).

6855172752868 is a wasteful number, since it uses less digits than its factorization.

6855172752868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155799380762 (or 155799380760 counting only the distinct ones).

The product of its digits is 451584000, while the sum is 70.

The spelling of 6855172752868 in words is "six trillion, eight hundred fifty-five billion, one hundred seventy-two million, seven hundred fifty-two thousand, eight hundred sixty-eight".