64520545 has 8 divisors (see below), whose sum is σ = 77484096. Its totient is φ = 51576816.

The previous prime is 64520537. The next prime is 64520551. The reversal of 64520545 is 54502546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64520545 - 2³ = 64520537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 11896.

It is an arithmetic number, because the mean of its divisors is an integer number (9685512).

Almost surely, 2^64520545 is an apocalyptic number.

It is an amenable number.

64520545 is a deficient number, since it is larger than the sum of its proper divisors (12963551).

64520545 is a wasteful number, since it uses less digits than its factorization.

64520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9911.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 64520545 is about 8032.4681760963. The cubic root of 64520545 is about 401.0815417828.

The spelling of 64520545 in words is "sixty-four million, five hundred twenty thousand, five hundred forty-five".