64636424 has 16 divisors (see below), whose sum is σ = 121523820. Its totient is φ = 32230080.

The previous prime is 64636399. The next prime is 64636427. The reversal of 64636424 is 42463646.

It can be written as a sum of positive squares in 2 ways, for example, as 64288324 + 348100 = 8018^2 + 590^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64636427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7847 + ... + 13814.

Almost surely, 2^64636424 is an apocalyptic number.

It is an amenable number.

64636424 is a deficient number, since it is larger than the sum of its proper divisors (56887396).

64636424 is a wasteful number, since it uses less digits than its factorization.

64636424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22040 (or 22036 counting only the distinct ones).

The product of its digits is 82944, while the sum is 35.

The square root of 64636424 is about 8039.6781030089. The cubic root of 64636424 is about 401.3215125368.

It can be divided in two parts, 6463642 and 4, that added together give a palindrome (6463646).

The spelling of 64636424 in words is "sixty-four million, six hundred thirty-six thousand, four hundred twenty-four".