64636142 has 16 divisors (see below), whose sum is σ = 103472640. Its totient is φ = 30175488.

The previous prime is 64636133. The next prime is 64636163. The reversal of 64636142 is 24163646.

It is a junction number, because it is equal to n+sod(n) for n = 64636099 and 64636108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 11802.

It is an arithmetic number, because the mean of its divisors is an integer number (6467040).

Almost surely, 2^64636142 is an apocalyptic number.

64636142 is a deficient number, since it is larger than the sum of its proper divisors (38836498).

64636142 is a wasteful number, since it uses less digits than its factorization.

64636142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15115.

The product of its digits is 20736, while the sum is 32.

The square root of 64636142 is about 8039.6605649741. The cubic root of 64636142 is about 401.3209288987.

Adding to 64636142 its reverse (24163646), we get a palindrome (88799788).

The spelling of 64636142 in words is "sixty-four million, six hundred thirty-six thousand, one hundred forty-two".