63994849936 has 10 divisors (see below), whose sum is σ = 123990021782. Its totient is φ = 31997424960.

The previous prime is 63994849859. The next prime is 63994849949.

63994849936 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 63633089536 + 361760400 = 252256^2 + 19020^2 .

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 as a sum of consecutive naturals, namely, 1999839045 + ... + 1999839076.

Almost surely, 2^63994849936 is an apocalyptic number.

It is an amenable number.

63994849936 is a deficient number, since it is larger than the sum of its proper divisors (59995171846).

63994849936 is a wasteful number, since it uses less digits than its factorization.

63994849936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999678129 (or 3999678123 counting only the distinct ones).

The product of its digits is 272097792, while the sum is 70.

The spelling of 63994849936 in words is "sixty-three billion, nine hundred ninety-four million, eight hundred forty-nine thousand, nine hundred thirty-six".