65116240 has 40 divisors (see below), whose sum is σ = 173024640. Its totient is φ = 22325376.

The previous prime is 65116229. The next prime is 65116253. The reversal of 65116240 is 4261156.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57580 + ... + 58699.

It is an arithmetic number, because the mean of its divisors is an integer number (4325616).

Almost surely, 2^65116240 is an apocalyptic number.

It is an amenable number.

65116240 is an abundant number, since it is smaller than the sum of its proper divisors (107908400).

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

65116240 is a wasteful number, since it uses less digits than its factorization.

65116240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116299 (or 116293 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 65116240 is about 8069.4634270192. The cubic root of 65116240 is about 402.3121096223.

Adding to 65116240 its reverse (4261156), we get a palindrome (69377396).

It can be divided in two parts, 65116 and 240, that added together give a palindrome (65356).

The spelling of 65116240 in words is "sixty-five million, one hundred sixteen thousand, two hundred forty".