65120109 has 16 divisors (see below), whose sum is σ = 90433920. Its totient is φ = 41630400.

The previous prime is 65120089. The next prime is 65120117. The reversal of 65120109 is 90102156.

It is not a de Polignac number, because 65120109 - 2¹⁶ = 65054573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65120009) 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, 10659 + ... + 15615.

It is an arithmetic number, because the mean of its divisors is an integer number (5652120).

Almost surely, 2^65120109 is an apocalyptic number.

It is an amenable number.

65120109 is a deficient number, since it is larger than the sum of its proper divisors (25313811).

65120109 is a wasteful number, since it uses less digits than its factorization.

65120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 65120109 is about 8069.7031543917. The cubic root of 65120109 is about 402.3200775001.

The spelling of 65120109 in words is "sixty-five million, one hundred twenty thousand, one hundred nine".