64005715 has 32 divisors (see below), whose sum is σ = 82627776. Its totient is φ = 47523840.

The previous prime is 64005709. The next prime is 64005727. The reversal of 64005715 is 51750046.

64005715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64005715 - 2³ = 64005707 is a prime.

It is a super-2 number, since 2×64005715² = 8193463105322450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467127 + ... + 467263.

It is an arithmetic number, because the mean of its divisors is an integer number (2582118).

Almost surely, 2^64005715 is an apocalyptic number.

64005715 is a deficient number, since it is larger than the sum of its proper divisors (18622061).

64005715 is a wasteful number, since it uses less digits than its factorization.

64005715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 64005715 is about 8000.3571795264. The cubic root of 64005715 is about 400.0119058956.

The spelling of 64005715 in words is "sixty-four million, five thousand, seven hundred fifteen".