64765871 has 4 divisors (see below), whose sum is σ = 64798992. Its totient is φ = 64732752.

The previous prime is 64765867. The next prime is 64765891. The reversal of 64765871 is 17856746.

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 64765871 - 2² = 64765867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64765891) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13430 + ... + 17603.

It is an arithmetic number, because the mean of its divisors is an integer number (16199748).

Almost surely, 2^64765871 is an apocalyptic number.

64765871 is a deficient number, since it is larger than the sum of its proper divisors (33121).

64765871 is a wasteful number, since it uses less digits than its factorization.

64765871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33120.

The product of its digits is 282240, while the sum is 44.

The square root of 64765871 is about 8047.7245852477. The cubic root of 64765871 is about 401.5892419957.

The spelling of 64765871 in words is "sixty-four million, seven hundred sixty-five thousand, eight hundred seventy-one".