63673063637 has 4 divisors (see below), whose sum is σ = 63996277356. Its totient is φ = 63349849920.

The previous prime is 63673063631. The next prime is 63673063687. The reversal of 63673063637 is 73636037636.

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 63158726596 + 514337041 = 251314^2 + 22679^2 .

It is a cyclic number.

It is not a de Polignac number, because 63673063637 - 2⁴ = 63673063621 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 (63673063631) 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, 161606564 + ... + 161606957.

It is an arithmetic number, because the mean of its divisors is an integer number (15999069339).

Almost surely, 2^63673063637 is an apocalyptic number.

It is an amenable number.

63673063637 is a deficient number, since it is larger than the sum of its proper divisors (323213719).

63673063637 is a wasteful number, since it uses less digits than its factorization.

63673063637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323213718.

The product of its (nonzero) digits is 5143824, while the sum is 50.

The spelling of 63673063637 in words is "sixty-three billion, six hundred seventy-three million, sixty-three thousand, six hundred thirty-seven".