6812171355 has 32 divisors (see below), whose sum is σ = 12114696960. Its totient is φ = 3240548480.

The previous prime is 6812171347. The next prime is 6812171363. The reversal of 6812171355 is 5531712186.

It is an interprime number because it is at equal distance from previous prime (6812171347) and next prime (6812171363).

It is not a de Polignac number, because 6812171355 - 2³ = 6812171347 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 380745 + ... + 398234.

It is an arithmetic number, because the mean of its divisors is an integer number (378584280).

Almost surely, 2^6812171355 is an apocalyptic number.

6812171355 is a deficient number, since it is larger than the sum of its proper divisors (5302525605).

6812171355 is a wasteful number, since it uses less digits than its factorization.

6812171355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779051.

The product of its digits is 50400, while the sum is 39.

The square root of 6812171355 is about 82535.8791980797. The cubic root of 6812171355 is about 1895.6661474993. Note that the first 3 decimals are identical.

The spelling of 6812171355 in words is "six billion, eight hundred twelve million, one hundred seventy-one thousand, three hundred fifty-five".