64624633 has 4 divisors (see below), whose sum is σ = 68426100. Its totient is φ = 60823168.

The previous prime is 64624631. The next prime is 64624639. The reversal of 64624633 is 33642646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 46621584 = 4243^2 + 6828^2 .

It is a cyclic number.

It is not a de Polignac number, because 64624633 - 2¹ = 64624631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64624631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900708 + ... + 1900741.

It is an arithmetic number, because the mean of its divisors is an integer number (17106525).

Almost surely, 2^64624633 is an apocalyptic number.

It is an amenable number.

64624633 is a deficient number, since it is larger than the sum of its proper divisors (3801467).

64624633 is a wasteful number, since it uses less digits than its factorization.

64624633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801466.

The product of its digits is 62208, while the sum is 34.

The square root of 64624633 is about 8038.9447690602. The cubic root of 64624633 is about 401.2971079806.

The spelling of 64624633 in words is "sixty-four million, six hundred twenty-four thousand, six hundred thirty-three".