6451356651 has 4 divisors (see below), whose sum is σ = 8601808872. Its totient is φ = 4300904432.

The previous prime is 6451356647. The next prime is 6451356661. The reversal of 6451356651 is 1566531546.

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 6451356651 - 2² = 6451356647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6451356661) 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, 1075226106 + ... + 1075226111.

It is an arithmetic number, because the mean of its divisors is an integer number (2150452218).

Almost surely, 2^6451356651 is an apocalyptic number.

6451356651 is a deficient number, since it is larger than the sum of its proper divisors (2150452221).

6451356651 is a wasteful number, since it uses less digits than its factorization.

6451356651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150452220.

The product of its digits is 324000, while the sum is 42.

The square root of 6451356651 is about 80320.3377171685. The cubic root of 6451356651 is about 1861.5884848986.

The spelling of 6451356651 in words is "six billion, four hundred fifty-one million, three hundred fifty-six thousand, six hundred fifty-one".