63954363664 has 45 divisors (see below), whose sum is σ = 131664659077. Its totient is φ = 30088078592.

The previous prime is 63954363637. The next prime is 63954363673. The reversal of 63954363664 is 46636345936.

The square root of 63954363664 is 252892.

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

63954363664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49791459600 + 14162904064 = 223140^2 + 119008^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17194797 + ... + 17198515.

Almost surely, 2^63954363664 is an apocalyptic number.

63954363664 is the 252892-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63954363664

63954363664 is an abundant number, since it is smaller than the sum of its proper divisors (67710295413).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63954363664 is an frugal number, since it uses more digits than its factorization.

63954363664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7480 (or 3738 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 55.

The spelling of 63954363664 in words is "sixty-three billion, nine hundred fifty-four million, three hundred sixty-three thousand, six hundred sixty-four".