63641 has 4 divisors (see below), whose sum is σ = 66432. Its totient is φ = 60852.

The previous prime is 63629. The next prime is 63647. The reversal of 63641 is 14636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63641 - 2⁶ = 63577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63647) 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, 1361 + ... + 1406.

It is an arithmetic number, because the mean of its divisors is an integer number (16608).

2⁶³⁶⁴¹ is an apocalyptic number.

It is an amenable number.

63641 is a deficient number, since it is larger than the sum of its proper divisors (2791).

63641 is a wasteful number, since it uses less digits than its factorization.

63641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790.

The product of its digits is 432, while the sum is 20.

The square root of 63641 is about 252.2716789495. The cubic root of 63641 is about 39.9250680511.

The spelling of 63641 in words is "sixty-three thousand, six hundred forty-one".