6855069905 has 8 divisors (see below), whose sum is σ = 8226898152. Its totient is φ = 5483513088.

The previous prime is 6855069877. The next prime is 6855069917. The reversal of 6855069905 is 5099605586.

It can be written as a sum of positive squares in 4 ways, for example, as 937768129 + 5917301776 = 30623^2 + 76924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6855069905 - 2¹² = 6855065809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7394 + ... + 117323.

It is an arithmetic number, because the mean of its divisors is an integer number (1028362269).

Almost surely, 2^6855069905 is an apocalyptic number.

It is an amenable number.

6855069905 is a deficient number, since it is larger than the sum of its proper divisors (1371828247).

6855069905 is a wasteful number, since it uses less digits than its factorization.

6855069905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135715.

The product of its (nonzero) digits is 2916000, while the sum is 53.

The square root of 6855069905 is about 82795.3495372778. The cubic root of 6855069905 is about 1899.6370410096.

The spelling of 6855069905 in words is "six billion, eight hundred fifty-five million, sixty-nine thousand, nine hundred five".