64642012 has 12 divisors (see below), whose sum is σ = 113487136. Its totient is φ = 32217120.

The previous prime is 64641979. The next prime is 64642013. The reversal of 64642012 is 21024646.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642013) 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, 24564 + ... + 27067.

Almost surely, 2^64642012 is an apocalyptic number.

It is an amenable number.

64642012 is a deficient number, since it is larger than the sum of its proper divisors (48845124).

64642012 is a wasteful number, since it uses less digits than its factorization.

64642012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51948 (or 51946 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 64642012 is about 8040.0256218497. The cubic root of 64642012 is about 401.3330773267. Note that the first 3 decimals are identical.

Adding to 64642012 its reverse (21024646), we get a palindrome (85666658).

The spelling of 64642012 in words is "sixty-four million, six hundred forty-two thousand, twelve".