6855004553 has 4 divisors (see below), whose sum is σ = 7022199828. Its totient is φ = 6687809280.

The previous prime is 6855004523. The next prime is 6855004561. The reversal of 6855004553 is 3554005586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214710409 + 6640294144 = 14653^2 + 81488^2 .

It is a cyclic number.

It is not a de Polignac number, because 6855004553 - 2⁸ = 6855004297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 167195233 = 6855004553 / (6 + 8 + 5 + 5 + 0 + 0 + 4 + 5 + 5 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6855004553.

It is not an unprimeable number, because it can be changed into a prime (6855004523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83597576 + ... + 83597657.

It is an arithmetic number, because the mean of its divisors is an integer number (1755549957).

Almost surely, 2^6855004553 is an apocalyptic number.

It is an amenable number.

6855004553 is a deficient number, since it is larger than the sum of its proper divisors (167195275).

6855004553 is a wasteful number, since it uses less digits than its factorization.

6855004553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167195274.

The product of its (nonzero) digits is 360000, while the sum is 41.

The square root of 6855004553 is about 82794.9548764899. The cubic root of 6855004553 is about 1899.6310043353.

The spelling of 6855004553 in words is "six billion, eight hundred fifty-five million, four thousand, five hundred fifty-three".