64313720651 has 2 divisors, whose sum is σ = 64313720652. Its totient is φ = 64313720650.

The previous prime is 64313720617. The next prime is 64313720671. The reversal of 64313720651 is 15602731346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64313720651 - 2¹⁸ = 64313458507 is a prime.

It is not a weakly prime, because it can be changed into another prime (64313720671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32156860325 + 32156860326.

It is an arithmetic number, because the mean of its divisors is an integer number (32156860326).

Almost surely, 2^64313720651 is an apocalyptic number.

64313720651 is a deficient number, since it is larger than the sum of its proper divisors (1).

64313720651 is an equidigital number, since it uses as much as digits as its factorization.

64313720651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 64313720651 in words is "sixty-four billion, three hundred thirteen million, seven hundred twenty thousand, six hundred fifty-one".