6551005123 has 4 divisors (see below), whose sum is σ = 7054928608. Its totient is φ = 6047081640.

The previous prime is 6551005099. The next prime is 6551005169. The reversal of 6551005123 is 3215001556.

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

It is a cyclic number.

It is not a de Polignac number, because 6551005123 - 2²⁹ = 6014134211 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 6551005091 and 6551005100.

It is not an unprimeable number, because it can be changed into a prime (6551005423) 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, 251961723 + ... + 251961748.

It is an arithmetic number, because the mean of its divisors is an integer number (1763732152).

Almost surely, 2^6551005123 is an apocalyptic number.

6551005123 is a deficient number, since it is larger than the sum of its proper divisors (503923485).

6551005123 is a wasteful number, since it uses less digits than its factorization.

6551005123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503923484.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 6551005123 is about 80938.2797136188. The cubic root of 6551005123 is about 1871.1243320133.

Adding to 6551005123 its reverse (3215001556), we get a palindrome (9766006679).

The spelling of 6551005123 in words is "six billion, five hundred fifty-one million, five thousand, one hundred twenty-three".