65109616 has 90 divisors (see below), whose sum is σ = 150901800. Its totient is φ = 27181440.

The previous prime is 65109613. The next prime is 65109659. The reversal of 65109616 is 61690156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65109613) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 327085 + ... + 327283.

Almost surely, 2^65109616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65109616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75450900).

65109616 is an abundant number, since it is smaller than the sum of its proper divisors (85792184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65109616 is a wasteful number, since it uses less digits than its factorization.

65109616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 65109616 is about 8069.0529803689. The cubic root of 65109616 is about 402.2984673226.

The spelling of 65109616 in words is "sixty-five million, one hundred nine thousand, six hundred sixteen".