6855653551 has 4 divisors (see below), whose sum is σ = 6856770312. Its totient is φ = 6854536792.

The previous prime is 6855653537. The next prime is 6855653591. The reversal of 6855653551 is 1553565586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1553565586 = 2 ⋅776782793.

It is a cyclic number.

It is not a de Polignac number, because 6855653551 - 2¹¹ = 6855651503 is a prime.

It is a super-2 number, since 2×6855653551² = 93999971222677819202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6855653495 and 6855653504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855653591) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 549121 + ... + 561466.

It is an arithmetic number, because the mean of its divisors is an integer number (1714192578).

Almost surely, 2^6855653551 is an apocalyptic number.

6855653551 is a deficient number, since it is larger than the sum of its proper divisors (1116761).

6855653551 is a wasteful number, since it uses less digits than its factorization.

6855653551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116760.

The product of its digits is 2700000, while the sum is 49.

The square root of 6855653551 is about 82798.8740925865. The cubic root of 6855653551 is about 1899.6909516729.

The spelling of 6855653551 in words is "six billion, eight hundred fifty-five million, six hundred fifty-three thousand, five hundred fifty-one".