64508071 has 4 divisors (see below), whose sum is σ = 64639944. Its totient is φ = 64376200.

The previous prime is 64508033. The next prime is 64508137. The reversal of 64508071 is 17080546.

64508071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64508071 - 2¹⁷ = 64376999 is a prime.

It is a super-2 number, since 2×64508071² = 8322582448282082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64508671) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 65200 + ... + 66181.

It is an arithmetic number, because the mean of its divisors is an integer number (16159986).

Almost surely, 2^64508071 is an apocalyptic number.

64508071 is a deficient number, since it is larger than the sum of its proper divisors (131873).

64508071 is a wasteful number, since it uses less digits than its factorization.

64508071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131872.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 64508071 is about 8031.6916648985. The cubic root of 64508071 is about 401.0556925818.

The spelling of 64508071 in words is "sixty-four million, five hundred eight thousand, seventy-one".