65115109 has 4 divisors (see below), whose sum is σ = 68542240. Its totient is φ = 61687980.

The previous prime is 65115107. The next prime is 65115143. The reversal of 65115109 is 90151156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65115109 - 2¹ = 65115107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65115103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1713537 + ... + 1713574.

It is an arithmetic number, because the mean of its divisors is an integer number (17135560).

Almost surely, 2^65115109 is an apocalyptic number.

It is an amenable number.

65115109 is a deficient number, since it is larger than the sum of its proper divisors (3427131).

65115109 is a wasteful number, since it uses less digits than its factorization.

65115109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427130.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 65115109 is about 8069.3933477059. The cubic root of 65115109 is about 402.3097803640.

It can be divided in two parts, 6 and 5115109, that added together give a palindrome (5115115).

The spelling of 65115109 in words is "sixty-five million, one hundred fifteen thousand, one hundred nine".