63645750 has 160 divisors (see below), whose sum is σ = 203860800. Its totient is φ = 14515200.

The previous prime is 63645731. The next prime is 63645767. The reversal of 63645750 is 5754636.

63645750 is a `hidden beast` number, since 6 + 3 + 645 + 7 + 5 + 0 = 666.

63645750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 79 ways as a sum of consecutive naturals, for example, 141526 + ... + 141974.

It is an arithmetic number, because the mean of its divisors is an integer number (1274130).

Almost surely, 2^63645750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63645750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101930400).

63645750 is an abundant number, since it is smaller than the sum of its proper divisors (140215050).

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

63645750 is a wasteful number, since it uses less digits than its factorization.

63645750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 63645750 is about 7977.8286519579. The cubic root of 63645750 is about 399.2606132770.

The spelling of 63645750 in words is "sixty-three million, six hundred forty-five thousand, seven hundred fifty".