63955644 has 24 divisors (see below), whose sum is σ = 149455488. Its totient is φ = 21286320.

The previous prime is 63955631. The next prime is 63955657. The reversal of 63955644 is 44655936.

It is an interprime number because it is at equal distance from previous prime (63955631) and next prime (63955657).

It is a junction number, because it is equal to n+sod(n) for n = 63955596 and 63955605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5059 + ... + 12389.

It is an arithmetic number, because the mean of its divisors is an integer number (6227312).

Almost surely, 2^63955644 is an apocalyptic number.

It is an amenable number.

63955644 is an abundant number, since it is smaller than the sum of its proper divisors (85499844).

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

63955644 is a wasteful number, since it uses less digits than its factorization.

63955644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8065 (or 8063 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 63955644 is about 7997.2272694978. The cubic root of 63955644 is about 399.9075703102.

The spelling of 63955644 in words is "sixty-three million, nine hundred fifty-five thousand, six hundred forty-four".