64518611 has 4 divisors (see below), whose sum is σ = 67323792. Its totient is φ = 61713432.

The previous prime is 64518607. The next prime is 64518617. The reversal of 64518611 is 11681546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11681546 = 2 ⋅5840773.

It is a cyclic number.

It is not a de Polignac number, because 64518611 - 2² = 64518607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64518617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402556 + ... + 1402601.

It is an arithmetic number, because the mean of its divisors is an integer number (16830948).

Almost surely, 2^64518611 is an apocalyptic number.

64518611 is a deficient number, since it is larger than the sum of its proper divisors (2805181).

64518611 is a wasteful number, since it uses less digits than its factorization.

64518611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805180.

The product of its digits is 5760, while the sum is 32.

The square root of 64518611 is about 8032.3477887850. The cubic root of 64518611 is about 401.0775342766.

The spelling of 64518611 in words is "sixty-four million, five hundred eighteen thousand, six hundred eleven".