651306046721 has 12 divisors (see below), whose sum is σ = 715932644196. Its totient is φ = 592068069120.

The previous prime is 651306046709. The next prime is 651306046739. The reversal of 651306046721 is 127640603156.

It can be written as a sum of positive squares in 2 ways, for example, as 48283909696 + 603022137025 = 219736^2 + 776545^2 .

It is a de Polignac number, because none of the positive numbers 2^k-651306046721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651306042721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2658041 + ... + 2892713.

It is an arithmetic number, because the mean of its divisors is an integer number (59661053683).

Almost surely, 2^651306046721 is an apocalyptic number.

It is an amenable number.

651306046721 is a deficient number, since it is larger than the sum of its proper divisors (64626597475).

651306046721 is a wasteful number, since it uses less digits than its factorization.

651306046721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257632 (or 257621 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 651306046721 its reverse (127640603156), we get a palindrome (778946649877).

The spelling of 651306046721 in words is "six hundred fifty-one billion, three hundred six million, forty-six thousand, seven hundred twenty-one".