6451116251 has 4 divisors (see below), whose sum is σ = 6483863232. Its totient is φ = 6418369272.

The previous prime is 6451116223. The next prime is 6451116253. The reversal of 6451116251 is 1526111546.

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 6451116251 - 2¹⁰ = 6451115227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6451116253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16373195 + ... + 16373588.

It is an arithmetic number, because the mean of its divisors is an integer number (1620965808).

Almost surely, 2^6451116251 is an apocalyptic number.

6451116251 is a deficient number, since it is larger than the sum of its proper divisors (32746981).

6451116251 is a wasteful number, since it uses less digits than its factorization.

6451116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32746980.

The product of its digits is 7200, while the sum is 32.

The square root of 6451116251 is about 80318.8411955750. The cubic root of 6451116251 is about 1861.5653615229.

Adding to 6451116251 its reverse (1526111546), we get a palindrome (7977227797).

The spelling of 6451116251 in words is "six billion, four hundred fifty-one million, one hundred sixteen thousand, two hundred fifty-one".