65275509 has 8 divisors (see below), whose sum is σ = 93728992. Its totient is φ = 40169520.

The previous prime is 65275493. The next prime is 65275513. The reversal of 65275509 is 90557256.

65275509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65275509 - 2⁴ = 65275493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1673731 = 65275509 / (6 + 5 + 2 + 7 + 5 + 5 + 0 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65275519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836827 + ... + 836904.

It is an arithmetic number, because the mean of its divisors is an integer number (11716124).

Almost surely, 2^65275509 is an apocalyptic number.

It is an amenable number.

65275509 is a deficient number, since it is larger than the sum of its proper divisors (28453483).

65275509 is a wasteful number, since it uses less digits than its factorization.

65275509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673747.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 65275509 is about 8079.3260238711. The cubic root of 65275509 is about 402.6398500694.

The spelling of 65275509 in words is "sixty-five million, two hundred seventy-five thousand, five hundred nine".