65509411 has 16 divisors (see below), whose sum is σ = 73192320. Its totient is φ = 58129920.

The previous prime is 65509337. The next prime is 65509421. The reversal of 65509411 is 11490556.

It is a cyclic number.

It is not a de Polignac number, because 65509411 - 2¹¹ = 65507363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65509421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124996 + ... + 125518.

It is an arithmetic number, because the mean of its divisors is an integer number (4574520).

Almost surely, 2^65509411 is an apocalyptic number.

65509411 is a deficient number, since it is larger than the sum of its proper divisors (7682909).

65509411 is a wasteful number, since it uses less digits than its factorization.

65509411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 65509411 is about 8093.7884207582. The cubic root of 65509411 is about 403.1202037849.

Adding to 65509411 its reverse (11490556), we get a palindrome (76999967).

The spelling of 65509411 in words is "sixty-five million, five hundred nine thousand, four hundred eleven".