64345571 has 4 divisors (see below), whose sum is σ = 67732200. Its totient is φ = 60958944.

The previous prime is 64345549. The next prime is 64345583. The reversal of 64345571 is 17554346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17554346 = 2 ⋅8777173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64345571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64345531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693286 + ... + 1693323.

It is an arithmetic number, because the mean of its divisors is an integer number (16933050).

Almost surely, 2^64345571 is an apocalyptic number.

64345571 is a deficient number, since it is larger than the sum of its proper divisors (3386629).

64345571 is a wasteful number, since it uses less digits than its factorization.

64345571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386628.

The product of its digits is 50400, while the sum is 35.

The square root of 64345571 is about 8021.5691108411. The cubic root of 64345571 is about 400.7186476739.

The spelling of 64345571 in words is "sixty-four million, three hundred forty-five thousand, five hundred seventy-one".