64135205 has 4 divisors (see below), whose sum is σ = 76962252. Its totient is φ = 51308160.

The previous prime is 64135199. The next prime is 64135207. The reversal of 64135205 is 50253146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50253146 = 2 ⋅25126573.

It can be written as a sum of positive squares in 2 ways, for example, as 13184161 + 50951044 = 3631^2 + 7138^2 .

It is not a de Polignac number, because 64135205 - 2⁴ = 64135189 is a prime.

It is a super-2 number, since 2×64135205² = 8226649040784050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64135207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413516 + ... + 6413525.

It is an arithmetic number, because the mean of its divisors is an integer number (19240563).

Almost surely, 2^64135205 is an apocalyptic number.

It is an amenable number.

64135205 is a deficient number, since it is larger than the sum of its proper divisors (12827047).

64135205 is a wasteful number, since it uses less digits than its factorization.

64135205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12827046.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 64135205 is about 8008.4458542217. The cubic root of 64135205 is about 400.2814789609.

The spelling of 64135205 in words is "sixty-four million, one hundred thirty-five thousand, two hundred five".