63644070 has 64 divisors (see below), whose sum is σ = 179306496. Its totient is φ = 14152320.

The previous prime is 63644057. The next prime is 63644071. The reversal of 63644070 is 7044636.

63644070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63644071) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3675 + ... + 11865.

It is an arithmetic number, because the mean of its divisors is an integer number (2801664).

Almost surely, 2^63644070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63644070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89653248).

63644070 is an abundant number, since it is smaller than the sum of its proper divisors (115662426).

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

63644070 is a wasteful number, since it uses less digits than its factorization.

63644070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8245.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 63644070 is about 7977.7233594554. The cubic root of 63644070 is about 399.2571002708.

The spelling of 63644070 in words is "sixty-three million, six hundred forty-four thousand, seventy".