64515073 has 16 divisors (see below), whose sum is σ = 75202560. Its totient is φ = 54205200.

The previous prime is 64515049. The next prime is 64515079. The reversal of 64515073 is 37051546.

It is not a de Polignac number, because 64515073 - 2⁵ = 64515041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64515079) 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 15 ways as a sum of consecutive naturals, for example, 134448 + ... + 134926.

It is an arithmetic number, because the mean of its divisors is an integer number (4700160).

Almost surely, 2^64515073 is an apocalyptic number.

It is an amenable number.

64515073 is a deficient number, since it is larger than the sum of its proper divisors (10687487).

64515073 is a wasteful number, since it uses less digits than its factorization.

64515073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 64515073 is about 8032.1275512781. The cubic root of 64515073 is about 401.0702028610.

The spelling of 64515073 in words is "sixty-four million, five hundred fifteen thousand, seventy-three".