765316765 has 4 divisors (see below), whose sum is σ = 918380124. Its totient is φ = 612253408.

The previous prime is 765316759. The next prime is 765316777. The reversal of 765316765 is 567613567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567613567 = 3581 ⋅158507.

It can be written as a sum of positive squares in 2 ways, for example, as 295771204 + 469545561 = 17198^2 + 21669^2 .

It is a cyclic number.

It is not a de Polignac number, because 765316765 - 2⁵ = 765316733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76531672 + ... + 76531681.

It is an arithmetic number, because the mean of its divisors is an integer number (229595031).

Almost surely, 2^765316765 is an apocalyptic number.

It is an amenable number.

765316765 is a deficient number, since it is larger than the sum of its proper divisors (153063359).

765316765 is a wasteful number, since it uses less digits than its factorization.

765316765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153063358.

The product of its digits is 793800, while the sum is 46.

The square root of 765316765 is about 27664.3591105957. The cubic root of 765316765 is about 914.7036435608.

The spelling of 765316765 in words is "seven hundred sixty-five million, three hundred sixteen thousand, seven hundred sixty-five".