65481584 has 40 divisors (see below), whose sum is σ = 146999520. Its totient is φ = 27675648.

The previous prime is 65481571. The next prime is 65481589. The reversal of 65481584 is 48518456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65481589) 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, 4172 + ... + 12180.

It is an arithmetic number, because the mean of its divisors is an integer number (3674988).

Almost surely, 2^65481584 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 65481584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73499760).

65481584 is an abundant number, since it is smaller than the sum of its proper divisors (81517936).

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

65481584 is a wasteful number, since it uses less digits than its factorization.

65481584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097 (or 8091 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 65481584 is about 8092.0692038563. The cubic root of 65481584 is about 403.0631167473.

The spelling of 65481584 in words is "sixty-five million, four hundred eighty-one thousand, five hundred eighty-four".