65504809 has 8 divisors (see below), whose sum is σ = 66774240. Its totient is φ = 64240800.

The previous prime is 65504797. The next prime is 65504827. The reversal of 65504809 is 90840556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65504809 - 2¹⁵ = 65472041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65504849) 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, 29674 + ... + 31804.

It is an arithmetic number, because the mean of its divisors is an integer number (8346780).

Almost surely, 2^65504809 is an apocalyptic number.

It is an amenable number.

65504809 is a deficient number, since it is larger than the sum of its proper divisors (1269431).

65504809 is a wasteful number, since it uses less digits than its factorization.

65504809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 65504809 is about 8093.5041236784. The cubic root of 65504809 is about 403.1107639065.

The spelling of 65504809 in words is "sixty-five million, five hundred four thousand, eight hundred nine".