6855381456511 has 8 divisors (see below), whose sum is σ = 7834741329440. Its totient is φ = 5876026499808.

The previous prime is 6855381456509. The next prime is 6855381456527. The reversal of 6855381456511 is 1156541835586.

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 6855381456511 - 2¹ = 6855381456509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855381456811) 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 7 ways as a sum of consecutive naturals, for example, 2522425 + ... + 4480333.

It is an arithmetic number, because the mean of its divisors is an integer number (979342666180).

Almost surely, 2^{6855381456511} is an apocalyptic number.

6855381456511 is a deficient number, since it is larger than the sum of its proper divisors (979359872929).

6855381456511 is a wasteful number, since it uses less digits than its factorization.

6855381456511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458113.

The product of its digits is 17280000, while the sum is 58.

The spelling of 6855381456511 in words is "six trillion, eight hundred fifty-five billion, three hundred eighty-one million, four hundred fifty-six thousand, five hundred eleven".