64440023033 has 2 divisors, whose sum is σ = 64440023034. Its totient is φ = 64440023032.

The previous prime is 64440023003. The next prime is 64440023071. The reversal of 64440023033 is 33032004446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57212812864 + 7227210169 = 239192^2 + 85013^2 .

It is a cyclic number.

It is not a de Polignac number, because 64440023033 - 2¹⁴ = 64440006649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64440022987 and 64440023005.

It is not a weakly prime, because it can be changed into another prime (64440023003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32220011516 + 32220011517.

It is an arithmetic number, because the mean of its divisors is an integer number (32220011517).

Almost surely, 2^64440023033 is an apocalyptic number.

It is an amenable number.

64440023033 is a deficient number, since it is larger than the sum of its proper divisors (1).

64440023033 is an equidigital number, since it uses as much as digits as its factorization.

64440023033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 64440023033 its reverse (33032004446), we get a palindrome (97472027479).

The spelling of 64440023033 in words is "sixty-four billion, four hundred forty million, twenty-three thousand, thirty-three".