6855388305139 has 32 divisors (see below), whose sum is σ = 7943115571200. Its totient is φ = 5854937177760.

The previous prime is 6855388305079. The next prime is 6855388305173. The reversal of 6855388305139 is 9315038835586.

It is not a de Polignac number, because 6855388305139 - 2¹⁷ = 6855388174067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6855388305439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16558542 + ... + 16967500.

It is an arithmetic number, because the mean of its divisors is an integer number (248222361600).

Almost surely, 2^{6855388305139} is an apocalyptic number.

6855388305139 is a deficient number, since it is larger than the sum of its proper divisors (1087727266061).

6855388305139 is a wasteful number, since it uses less digits than its factorization.

6855388305139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410175.

The product of its (nonzero) digits is 93312000, while the sum is 64.

The spelling of 6855388305139 in words is "six trillion, eight hundred fifty-five billion, three hundred eighty-eight million, three hundred five thousand, one hundred thirty-nine".