64530815 has 8 divisors (see below), whose sum is σ = 77511168. Its totient is φ = 51575200.

The previous prime is 64530803. The next prime is 64530833. The reversal of 64530815 is 51803546.

It is a happy number.

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

It is not a de Polignac number, because 64530815 - 2¹⁴ = 64514431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 149 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (9688896).

Almost surely, 2^64530815 is an apocalyptic number.

64530815 is a deficient number, since it is larger than the sum of its proper divisors (12980353).

64530815 is a wasteful number, since it uses less digits than its factorization.

64530815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12369.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 64530815 is about 8033.1074311253. The cubic root of 64530815 is about 401.1028212522.

The spelling of 64530815 in words is "sixty-four million, five hundred thirty thousand, eight hundred fifteen".