64636442 has 16 divisors (see below), whose sum is σ = 109908960. Its totient is φ = 28261872.

The previous prime is 64636427. The next prime is 64636469. The reversal of 64636442 is 24463646.

64636442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64928 + ... + 65915.

It is an arithmetic number, because the mean of its divisors is an integer number (6869310).

Almost surely, 2^64636442 is an apocalyptic number.

64636442 is a deficient number, since it is larger than the sum of its proper divisors (45272518).

64636442 is a wasteful number, since it uses less digits than its factorization.

64636442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130877.

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

The square root of 64636442 is about 8039.6792224566. The cubic root of 64636442 is about 401.3215497902.

It can be divided in two parts, 6463644 and 2, that added together give a palindrome (6463646).

The spelling of 64636442 in words is "sixty-four million, six hundred thirty-six thousand, four hundred forty-two".