63664976384 has 20 divisors (see below), whose sum is σ = 127205608134. Its totient is φ = 31832487936.

The previous prime is 63664976371. The next prime is 63664976399. The reversal of 63664976384 is 48367946636.

It can be written as a sum of positive squares in only one way, i.e., 63641161984 + 23814400 = 252272^2 + 4880^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62172317 + ... + 62173340.

Almost surely, 2^63664976384 is an apocalyptic number.

63664976384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63664976384 is a deficient number, since it is larger than the sum of its proper divisors (63540631750).

63664976384 is an equidigital number, since it uses as much as digits as its factorization.

63664976384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124345675 (or 124345659 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 62.

The spelling of 63664976384 in words is "sixty-three billion, six hundred sixty-four million, nine hundred seventy-six thousand, three hundred eighty-four".