63643783538 has 8 divisors (see below), whose sum is σ = 97496860032. Its totient is φ = 31144830196.

The previous prime is 63643783501. The next prime is 63643783549. The reversal of 63643783538 is 83538734636.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338530670 + ... + 338530857.

It is an arithmetic number, because the mean of its divisors is an integer number (12187107504).

Almost surely, 2^63643783538 is an apocalyptic number.

63643783538 is a deficient number, since it is larger than the sum of its proper divisors (33853076494).

63643783538 is a wasteful number, since it uses less digits than its factorization.

63643783538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677061576.

The product of its digits is 26127360, while the sum is 56.

The spelling of 63643783538 in words is "sixty-three billion, six hundred forty-three million, seven hundred eighty-three thousand, five hundred thirty-eight".