64322787917 has 2 divisors, whose sum is σ = 64322787918.
Its totient is φ = 64322787916.
The previous prime is 64322787911. The next prime is 64322787983. The reversal of 64322787917 is 71978722346.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 64245013156 + 77774761 = 253466^2 + 8819^2
It is a cyclic number.
It is not a de Polignac number, because 64322787917 - 226 = 64255679053 is a prime.
It is a super-2 number, since 2×643227879172 (a number of 22 digits) contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (64322787911) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32161393958 + 32161393959.
It is an arithmetic number, because the mean of its divisors is an integer number (32161393959).
Almost surely, 264322787917 is an apocalyptic number.
It is an amenable number.
64322787917 is a deficient number, since it is larger than the sum of its proper divisors (1).
64322787917 is an equidigital number, since it uses as much as digits as its factorization.
64322787917 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 7112448, while the sum is 56.
The spelling of 64322787917 in words is "sixty-four billion, three hundred twenty-two million, seven hundred eighty-seven thousand, nine hundred seventeen".