64487515 has 8 divisors (see below), whose sum is σ = 80749728. Its totient is φ = 49346880.

The previous prime is 64487491. The next prime is 64487537. The reversal of 64487515 is 51578446.

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

It is not a de Polignac number, because 64487515 - 2⁵ = 64487483 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, 280266 + ... + 280495.

It is an arithmetic number, because the mean of its divisors is an integer number (10093716).

Almost surely, 2^64487515 is an apocalyptic number.

64487515 is a deficient number, since it is larger than the sum of its proper divisors (16262213).

64487515 is a wasteful number, since it uses less digits than its factorization.

64487515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560789.

The product of its digits is 134400, while the sum is 40.

The square root of 64487515 is about 8030.4118823383. The cubic root of 64487515 is about 401.0130882145.

The spelling of 64487515 in words is "sixty-four million, four hundred eighty-seven thousand, five hundred fifteen".