6855177139 has 2 divisors, whose sum is σ = 6855177140. Its totient is φ = 6855177138.

The previous prime is 6855177107. The next prime is 6855177191. The reversal of 6855177139 is 9317715586.

It is an a-pointer prime, because the next prime (6855177191) can be obtained adding 6855177139 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6855177139 - 2⁵ = 6855177107 is a prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427588569 + 3427588570.

It is an arithmetic number, because the mean of its divisors is an integer number (3427588570).

Almost surely, 2^6855177139 is an apocalyptic number.

6855177139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855177139 is an equidigital number, since it uses as much as digits as its factorization.

6855177139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 52.

The square root of 6855177139 is about 82795.9971194260. The cubic root of 6855177139 is about 1899.6469463118.

The spelling of 6855177139 in words is "six billion, eight hundred fifty-five million, one hundred seventy-seven thousand, one hundred thirty-nine".