65109864 has 64 divisors (see below), whose sum is σ = 175659840. Its totient is φ = 20034560.

The previous prime is 65109857. The next prime is 65109883. The reversal of 65109864 is 46890156.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20119 + ... + 23129.

It is an arithmetic number, because the mean of its divisors is an integer number (2744685).

Almost surely, 2^65109864 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 65109864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87829920).

65109864 is an abundant number, since it is smaller than the sum of its proper divisors (110549976).

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

65109864 is a wasteful number, since it uses less digits than its factorization.

65109864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090 (or 3086 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 65109864 is about 8069.0683477090. The cubic root of 65109864 is about 402.2989781017.

The spelling of 65109864 in words is "sixty-five million, one hundred nine thousand, eight hundred sixty-four".