65409504 has 72 divisors (see below), whose sum is σ = 177667560. Its totient is φ = 21070080.

The previous prime is 65409481. The next prime is 65409511. The reversal of 65409504 is 40590456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91902 + ... + 92610.

It is an arithmetic number, because the mean of its divisors is an integer number (2467605).

Almost surely, 2^65409504 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 65409504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88833780).

65409504 is an abundant number, since it is smaller than the sum of its proper divisors (112258056).

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

65409504 is a wasteful number, since it uses less digits than its factorization.

65409504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 65409504 is about 8087.6142341237. The cubic root of 65409504 is about 402.9151695214.

The spelling of 65409504 in words is "sixty-five million, four hundred nine thousand, five hundred four".