65048509 has 16 divisors (see below), whose sum is σ = 69995520. Its totient is φ = 60336000.

The previous prime is 65048429. The next prime is 65048539. The reversal of 65048509 is 90584056.

It is a cyclic number.

It is not a de Polignac number, because 65048509 - 2¹⁹ = 64524221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65048539) 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, 77112 + ... + 77950.

It is an arithmetic number, because the mean of its divisors is an integer number (4374720).

Almost surely, 2^65048509 is an apocalyptic number.

It is an amenable number.

65048509 is a deficient number, since it is larger than the sum of its proper divisors (4947011).

65048509 is a wasteful number, since it uses less digits than its factorization.

65048509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

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

The square root of 65048509 is about 8065.2655876915. The cubic root of 65048509 is about 402.1725722110.

The spelling of 65048509 in words is "sixty-five million, forty-eight thousand, five hundred nine".