63501984016 has 45 divisors (see below), whose sum is σ = 124888308069. Its totient is φ = 31279759488.

The previous prime is 63501983971. The next prime is 63501984017. The reversal of 63501984016 is 61048910536.

The square root of 63501984016 is 251996.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 36046819600 + 27455164416 = 189860^2 + 165696^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63501984017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73582401 + ... + 73583263.

Almost surely, 2^63501984016 is an apocalyptic number.

63501984016 is the 251996-th square number.

It is an amenable number.

63501984016 is a deficient number, since it is larger than the sum of its proper divisors (61386324053).

63501984016 is an frugal number, since it uses more digits than its factorization.

63501984016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 63501984016 in words is "sixty-three billion, five hundred one million, nine hundred eighty-four thousand, sixteen".