64440011 has 2 divisors, whose sum is σ = 64440012. Its totient is φ = 64440010.

The previous prime is 64439971. The next prime is 64440023. The reversal of 64440011 is 11004446.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64440011 is a prime.

It is not a weakly prime, because it can be changed into another prime (64440071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32220005 + 32220006.

It is an arithmetic number, because the mean of its divisors is an integer number (32220006).

Almost surely, 2^64440011 is an apocalyptic number.

64440011 is a deficient number, since it is larger than the sum of its proper divisors (1).

64440011 is an equidigital number, since it uses as much as digits as its factorization.

64440011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64440011 is about 8027.4535813046. The cubic root of 64440011 is about 400.9145967713.

Adding to 64440011 its reverse (11004446), we get a palindrome (75444457).

The spelling of 64440011 in words is "sixty-four million, four hundred forty thousand, eleven".