64713627689 has 2 divisors, whose sum is σ = 64713627690. Its totient is φ = 64713627688.

The previous prime is 64713627661. The next prime is 64713627707. The reversal of 64713627689 is 98672631746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64234368025 + 479259664 = 253445^2 + 21892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64713627689 is a prime.

It is not a weakly prime, because it can be changed into another prime (64713627089) 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 as a sum of consecutive naturals, namely, 32356813844 + 32356813845.

It is an arithmetic number, because the mean of its divisors is an integer number (32356813845).

Almost surely, 2^64713627689 is an apocalyptic number.

It is an amenable number.

64713627689 is a deficient number, since it is larger than the sum of its proper divisors (1).

64713627689 is an equidigital number, since it uses as much as digits as its factorization.

64713627689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 59.

The spelling of 64713627689 in words is "sixty-four billion, seven hundred thirteen million, six hundred twenty-seven thousand, six hundred eighty-nine".