63646109 has 4 divisors (see below), whose sum is σ = 63817116. Its totient is φ = 63475104.

The previous prime is 63646103. The next prime is 63646111. The reversal of 63646109 is 90164636.

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 54434884 + 9211225 = 7378^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 63646109 - 2¹² = 63642013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63646103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84944 + ... + 85689.

It is an arithmetic number, because the mean of its divisors is an integer number (15954279).

Almost surely, 2^63646109 is an apocalyptic number.

It is an amenable number.

63646109 is a deficient number, since it is larger than the sum of its proper divisors (171007).

63646109 is a wasteful number, since it uses less digits than its factorization.

63646109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171006.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 63646109 is about 7977.8511517827. The cubic root of 63646109 is about 399.2613639649.

The spelling of 63646109 in words is "sixty-three million, six hundred forty-six thousand, one hundred nine".