64333730897 has 2 divisors, whose sum is σ = 64333730898. Its totient is φ = 64333730896.

The previous prime is 64333730869. The next prime is 64333730899. The reversal of 64333730897 is 79803733346.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61307740816 + 3025990081 = 247604^2 + 55009^2 .

It is a cyclic number.

It is not a de Polignac number, because 64333730897 - 2⁶ = 64333730833 is a prime.

It is a super-2 number, since 2×64333730897² (a number of 22 digits) contains 22 as substring.

Together with 64333730899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64333730899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32166865448 + 32166865449.

It is an arithmetic number, because the mean of its divisors is an integer number (32166865449).

Almost surely, 2^64333730897 is an apocalyptic number.

It is an amenable number.

64333730897 is a deficient number, since it is larger than the sum of its proper divisors (1).

64333730897 is an equidigital number, since it uses as much as digits as its factorization.

64333730897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 53.

The spelling of 64333730897 in words is "sixty-four billion, three hundred thirty-three million, seven hundred thirty thousand, eight hundred ninety-seven".