63977648 has 20 divisors (see below), whose sum is σ = 141665040. Its totient is φ = 27418944.

The previous prime is 63977629. The next prime is 63977689. The reversal of 63977648 is 84677936.

It is a super-2 number, since 2×63977648² = 8186278887223808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63977596 and 63977605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285503 + ... + 285726.

It is an arithmetic number, because the mean of its divisors is an integer number (7083252).

Almost surely, 2^63977648 is an apocalyptic number.

It is an amenable number.

63977648 is an abundant number, since it is smaller than the sum of its proper divisors (77687392).

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

63977648 is a wasteful number, since it uses less digits than its factorization.

63977648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571244 (or 571238 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 63977648 is about 7998.6028780031. The cubic root of 63977648 is about 399.9534279111.

It can be divided in two parts, 639 and 77648, that added together give a palindrome (78287).

The spelling of 63977648 in words is "sixty-three million, nine hundred seventy-seven thousand, six hundred forty-eight".