64320511 has 2 divisors, whose sum is σ = 64320512. Its totient is φ = 64320510.

The previous prime is 64320479. The next prime is 64320517. The reversal of 64320511 is 11502346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64320511 - 2⁵ = 64320479 is a prime.

It is a super-2 number, since 2×64320511² = 8274256270602242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64320517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160255 + 32160256.

It is an arithmetic number, because the mean of its divisors is an integer number (32160256).

Almost surely, 2^64320511 is an apocalyptic number.

64320511 is a deficient number, since it is larger than the sum of its proper divisors (1).

64320511 is an equidigital number, since it uses as much as digits as its factorization.

64320511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 64320511 is about 8020.0069201965. The cubic root of 64320511 is about 400.6666196784. Note that the first 4 decimals are identical.

Adding to 64320511 its reverse (11502346), we get a palindrome (75822857).

The spelling of 64320511 in words is "sixty-four million, three hundred twenty thousand, five hundred eleven".