63445644 has 36 divisors (see below), whose sum is σ = 161650944. Its totient is φ = 20980512.

The previous prime is 63445621. The next prime is 63445651. The reversal of 63445644 is 44654436.

63445644 is a `hidden beast` number, since 6 + 3 + 4 + 4 + 5 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63445599 and 63445608.

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 11 ways as a sum of consecutive naturals, for example, 2367 + ... + 11510.

It is an arithmetic number, because the mean of its divisors is an integer number (4490304).

Almost surely, 2^63445644 is an apocalyptic number.

It is an amenable number.

63445644 is an abundant number, since it is smaller than the sum of its proper divisors (98205300).

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

63445644 is a wasteful number, since it uses less digits than its factorization.

63445644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14014 (or 14009 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 63445644 is about 7965.2773962995. The cubic root of 63445644 is about 398.8417409941.

The spelling of 63445644 in words is "sixty-three million, four hundred forty-five thousand, six hundred forty-four".