64579505 has 4 divisors (see below), whose sum is σ = 77495412. Its totient is φ = 51663600.

The previous prime is 64579483. The next prime is 64579511. The reversal of 64579505 is 50597546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50597546 = 2 ⋅25298773.

It can be written as a sum of positive squares in 2 ways, for example, as 22886656 + 41692849 = 4784^2 + 6457^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64579505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6457946 + ... + 6457955.

It is an arithmetic number, because the mean of its divisors is an integer number (19373853).

Almost surely, 2^64579505 is an apocalyptic number.

It is an amenable number.

64579505 is a deficient number, since it is larger than the sum of its proper divisors (12915907).

64579505 is a wasteful number, since it uses less digits than its factorization.

64579505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12915906.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 64579505 is about 8036.1374428266. The cubic root of 64579505 is about 401.2036763582.

The spelling of 64579505 in words is "sixty-four million, five hundred seventy-nine thousand, five hundred five".