64518235 has 4 divisors (see below), whose sum is σ = 77421888. Its totient is φ = 51614584.

The previous prime is 64518191. The next prime is 64518239. The reversal of 64518235 is 53281546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64518235 - 2⁷ = 64518107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64518235.

It is not an unprimeable number, because it can be changed into a prime (64518239) 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, 6451819 + ... + 6451828.

It is an arithmetic number, because the mean of its divisors is an integer number (19355472).

Almost surely, 2^64518235 is an apocalyptic number.

64518235 is a deficient number, since it is larger than the sum of its proper divisors (12903653).

64518235 is a wasteful number, since it uses less digits than its factorization.

64518235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12903652.

The product of its digits is 28800, while the sum is 34.

The square root of 64518235 is about 8032.3243833899. The cubic root of 64518235 is about 401.0767551451.

The spelling of 64518235 in words is "sixty-four million, five hundred eighteen thousand, two hundred thirty-five".