64365643513 has 2 divisors, whose sum is σ = 64365643514. Its totient is φ = 64365643512.

The previous prime is 64365643487. The next prime is 64365643541. The reversal of 64365643513 is 31534656346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35867814544 + 28497828969 = 189388^2 + 168813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64365643513 is a prime.

It is not a weakly prime, because it can be changed into another prime (64365643553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32182821756 + 32182821757.

It is an arithmetic number, because the mean of its divisors is an integer number (32182821757).

Almost surely, 2^64365643513 is an apocalyptic number.

It is an amenable number.

64365643513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64365643513 is an equidigital number, since it uses as much as digits as its factorization.

64365643513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 46.

The spelling of 64365643513 in words is "sixty-four billion, three hundred sixty-five million, six hundred forty-three thousand, five hundred thirteen".