64517111 has 2 divisors, whose sum is σ = 64517112. Its totient is φ = 64517110.

The previous prime is 64517099. The next prime is 64517113. The reversal of 64517111 is 11171546.

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-64517111 is a prime.

It is a super-2 number, since 2×64517111² = 8324915223572642, which contains 22 as substring.

Together with 64517113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64517113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32258555 + 32258556.

It is an arithmetic number, because the mean of its divisors is an integer number (32258556).

Almost surely, 2^64517111 is an apocalyptic number.

64517111 is a deficient number, since it is larger than the sum of its proper divisors (1).

64517111 is an equidigital number, since it uses as much as digits as its factorization.

64517111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 26.

The square root of 64517111 is about 8032.2544157914. The cubic root of 64517111 is about 401.0744260212.

Adding to 64517111 its reverse (11171546), we get a palindrome (75688657).

The spelling of 64517111 in words is "sixty-four million, five hundred seventeen thousand, one hundred eleven".