64637552 has 40 divisors (see below), whose sum is σ = 145487712. Its totient is φ = 27244800.

The previous prime is 64637533. The next prime is 64637561. The reversal of 64637552 is 25573646.

64637552 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 7 ways as a sum of consecutive naturals, for example, 2102 + ... + 11562.

Almost surely, 2^64637552 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 64637552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72743856).

64637552 is an abundant number, since it is smaller than the sum of its proper divisors (80850160).

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

64637552 is a wasteful number, since it uses less digits than its factorization.

64637552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537 (or 9531 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 64637552 is about 8039.7482547652. The cubic root of 64637552 is about 401.3238470720.

The spelling of 64637552 in words is "sixty-four million, six hundred thirty-seven thousand, five hundred fifty-two".