64993755089 has 2 divisors, whose sum is σ = 64993755090. Its totient is φ = 64993755088.

The previous prime is 64993755061. The next prime is 64993755109. The reversal of 64993755089 is 98055739946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63311114689 + 1682640400 = 251617^2 + 41020^2 .

It is a cyclic number.

It is not a de Polignac number, because 64993755089 - 2¹² = 64993750993 is a prime.

It is not a weakly prime, because it can be changed into another prime (64993755019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32496877544 + 32496877545.

It is an arithmetic number, because the mean of its divisors is an integer number (32496877545).

Almost surely, 2^64993755089 is an apocalyptic number.

It is an amenable number.

64993755089 is a deficient number, since it is larger than the sum of its proper divisors (1).

64993755089 is an equidigital number, since it uses as much as digits as its factorization.

64993755089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 64993755089 in words is "sixty-four billion, nine hundred ninety-three million, seven hundred fifty-five thousand, eighty-nine".