64339915 has 8 divisors (see below), whose sum is σ = 77334048. Its totient is φ = 51387840.

The previous prime is 64339879. The next prime is 64339927. The reversal of 64339915 is 51993346.

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

It is not a de Polignac number, because 64339915 - 2¹⁹ = 63815627 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7042 + ... + 13351.

It is an arithmetic number, because the mean of its divisors is an integer number (9666756).

Almost surely, 2^64339915 is an apocalyptic number.

64339915 is a deficient number, since it is larger than the sum of its proper divisors (12994133).

64339915 is a wasteful number, since it uses less digits than its factorization.

64339915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21029.

The product of its digits is 87480, while the sum is 40.

The square root of 64339915 is about 8021.2165536158. The cubic root of 64339915 is about 400.7069062230.

The spelling of 64339915 in words is "sixty-four million, three hundred thirty-nine thousand, nine hundred fifteen".