63171641 has 4 divisors (see below), whose sum is σ = 68031012. Its totient is φ = 58312272.

The previous prime is 63171629. The next prime is 63171649. The reversal of 63171641 is 14617136.

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 2876416 + 60295225 = 1696^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 63171641 - 2²² = 58977337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63171649) 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, 2429666 + ... + 2429691.

It is an arithmetic number, because the mean of its divisors is an integer number (17007753).

Almost surely, 2^63171641 is an apocalyptic number.

It is an amenable number.

63171641 is a deficient number, since it is larger than the sum of its proper divisors (4859371).

63171641 is a wasteful number, since it uses less digits than its factorization.

63171641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4859370.

The product of its digits is 3024, while the sum is 29.

The square root of 63171641 is about 7948.0589454281. The cubic root of 63171641 is about 398.2667525644.

Adding to 63171641 its reverse (14617136), we get a palindrome (77788777).

The spelling of 63171641 in words is "sixty-three million, one hundred seventy-one thousand, six hundred forty-one".