64871536 has 20 divisors (see below), whose sum is σ = 125829000. Its totient is φ = 32399552.

The previous prime is 64871501. The next prime is 64871537. The reversal of 64871536 is 63517846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64871537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18015 + ... + 21313.

It is an arithmetic number, because the mean of its divisors is an integer number (6291450).

Almost surely, 2^64871536 is an apocalyptic number.

It is an amenable number.

64871536 is a deficient number, since it is larger than the sum of its proper divisors (60957464).

64871536 is a wasteful number, since it uses less digits than its factorization.

64871536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536 (or 4530 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 64871536 is about 8054.2868088987. The cubic root of 64871536 is about 401.8075198768.

The spelling of 64871536 in words is "sixty-four million, eight hundred seventy-one thousand, five hundred thirty-six".