64800315617 has 2 divisors, whose sum is σ = 64800315618. Its totient is φ = 64800315616.

The previous prime is 64800315599. The next prime is 64800315637. The reversal of 64800315617 is 71651300846.

64800315617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64779921361 + 20394256 = 254519^2 + 4516^2 .

It is a cyclic number.

It is not a de Polignac number, because 64800315617 - 2¹⁸ = 64800053473 is a prime.

It is not a weakly prime, because it can be changed into another prime (64800315637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32400157808 + 32400157809.

It is an arithmetic number, because the mean of its divisors is an integer number (32400157809).

Almost surely, 2^64800315617 is an apocalyptic number.

It is an amenable number.

64800315617 is a deficient number, since it is larger than the sum of its proper divisors (1).

64800315617 is an equidigital number, since it uses as much as digits as its factorization.

64800315617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 64800315617 in words is "sixty-four billion, eight hundred million, three hundred fifteen thousand, six hundred seventeen".