64549632 has 72 divisors (see below), whose sum is σ = 196354816. Its totient is φ = 18441216.

The previous prime is 64549613. The next prime is 64549637. The reversal of 64549632 is 23694546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64549637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628 + ... + 11379.

Almost surely, 2^64549632 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 64549632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98177408).

64549632 is an abundant number, since it is smaller than the sum of its proper divisors (131805184).

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

64549632 is a wasteful number, since it uses less digits than its factorization.

64549632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12033 (or 12019 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 64549632 is about 8034.2785612649. The cubic root of 64549632 is about 401.1418042729.

The spelling of 64549632 in words is "sixty-four million, five hundred forty-nine thousand, six hundred thirty-two".