64725552 has 120 divisors (see below), whose sum is σ = 195664560. Its totient is φ = 19906560.

The previous prime is 64725541. The next prime is 64725553. The reversal of 64725552 is 25552746.

64725552 is a `hidden beast` number, since 647 + 2 + 5 + 5 + 5 + 2 = 666.

64725552 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 (36).

It is not an unprimeable number, because it can be changed into a prime (64725553) 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 23 ways as a sum of consecutive naturals, for example, 111888 + ... + 112464.

It is an arithmetic number, because the mean of its divisors is an integer number (1630538).

Almost surely, 2^64725552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64725552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97832280).

64725552 is an abundant number, since it is smaller than the sum of its proper divisors (130939008).

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

64725552 is a wasteful number, since it uses less digits than its factorization.

64725552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 642 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 64725552 is about 8045.2192014885. The cubic root of 64725552 is about 401.5058902884.

The spelling of 64725552 in words is "sixty-four million, seven hundred twenty-five thousand, five hundred fifty-two".