765837216 has 72 divisors (see below), whose sum is σ = 2305973124. Its totient is φ = 240261120.

The previous prime is 765837209. The next prime is 765837221. The reversal of 765837216 is 612738567.

It can be written as a sum of positive squares in 2 ways, for example, as 732243600 + 33593616 = 27060^2 + 5796^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73315 + ... + 83106.

Almost surely, 2^765837216 is an apocalyptic number.

It is an amenable number.

765837216 is an abundant number, since it is smaller than the sum of its proper divisors (1540135908).

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

765837216 is a wasteful number, since it uses less digits than its factorization.

765837216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156454 (or 156443 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 765837216 is about 27673.7640374417. The cubic root of 765837216 is about 914.9109435855.

The spelling of 765837216 in words is "seven hundred sixty-five million, eight hundred thirty-seven thousand, two hundred sixteen".