63947658705984 has 63 divisors (see below), whose sum is σ = 183294967685557. Its totient is φ = 21315822261504.

The previous prime is 63947658705979. The next prime is 63947658706021. The reversal of 63947658705984 is 48950785674936.

The square root of 63947658705984 is 7996728.

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

63947658705984 is a `hidden beast` number, since 6 + 3 + 9 + 476 + 58 + 7 + 0 + 5 + 98 + 4 = 666.

63947658705984 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., 61123000334400 + 2824658371584 = 7818120^2 + 1680672^2 .

It is a super-2 number, since 2×63947658705984² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 191754874 + ... + 192088070.

Almost surely, 2^{63947658705984} is an apocalyptic number.

63947658705984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

63947658705984 is the 7996728-th square number.

It is an amenable number.

63947658705984 is an abundant number, since it is smaller than the sum of its proper divisors (119347308979573).

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

63947658705984 is an frugal number, since it uses more digits than its factorization.

63947658705984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666412 (or 333202 counting only the distinct ones).

The product of its (nonzero) digits is 10973491200, while the sum is 81.

The spelling of 63947658705984 in words is "sixty-three trillion, nine hundred forty-seven billion, six hundred fifty-eight million, seven hundred five thousand, nine hundred eighty-four".