64711111 has 2 divisors, whose sum is σ = 64711112. Its totient is φ = 64711110.

The previous prime is 64711109. The next prime is 64711123. The reversal of 64711111 is 11111746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64711111 - 2¹ = 64711109 is a prime.

Together with 64711109, it forms a pair of twin primes.

64711111 is a modest number, since divided by 11111 gives 647 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64711211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32355555 + 32355556.

It is an arithmetic number, because the mean of its divisors is an integer number (32355556).

Almost surely, 2^64711111 is an apocalyptic number.

64711111 is a deficient number, since it is larger than the sum of its proper divisors (1).

64711111 is an equidigital number, since it uses as much as digits as its factorization.

64711111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 22.

The square root of 64711111 is about 8044.3216618929. The cubic root of 64711111 is about 401.4760279046.

Adding to 64711111 its reverse (11111746), we get a palindrome (75822857).

It can be divided in two parts, 647 and 11111, that multiplied together give a palindrome (7188817).

The spelling of 64711111 in words is "sixty-four million, seven hundred eleven thousand, one hundred eleven".