63661144 has 16 divisors (see below), whose sum is σ = 120168000. Its totient is φ = 31616352.

The previous prime is 63661099. The next prime is 63661159. The reversal of 63661144 is 44116636.

63661144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25512 + ... + 27895.

It is an arithmetic number, because the mean of its divisors is an integer number (7510500).

Almost surely, 2^63661144 is an apocalyptic number.

It is an amenable number.

63661144 is a deficient number, since it is larger than the sum of its proper divisors (56506856).

63661144 is a wasteful number, since it uses less digits than its factorization.

63661144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53562 (or 53558 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 63661144 is about 7978.7933924874. The cubic root of 63661144 is about 399.2928004087.

The spelling of 63661144 in words is "sixty-three million, six hundred sixty-one thousand, one hundred forty-four".