765985869 has 32 divisors (see below), whose sum is σ = 1243382400. Its totient is φ = 462199680.

The previous prime is 765985823. The next prime is 765985901. The reversal of 765985869 is 968589567.

It is not a de Polignac number, because 765985869 - 2¹¹ = 765983821 is a prime.

It is a super-2 number, since 2×765985869² = 1173468703015370322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765985369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63667 + ... + 74735.

It is an arithmetic number, because the mean of its divisors is an integer number (38855700).

Almost surely, 2^765985869 is an apocalyptic number.

It is an amenable number.

765985869 is a deficient number, since it is larger than the sum of its proper divisors (477396531).

765985869 is a wasteful number, since it uses less digits than its factorization.

765985869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11322 (or 11316 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The square root of 765985869 is about 27676.4497181268. The cubic root of 765985869 is about 914.9701360852.

It can be divided in two parts, 7659 and 85869, that added together give a triangular number (93528 = T₄₃₂).

The spelling of 765985869 in words is "seven hundred sixty-five million, nine hundred eighty-five thousand, eight hundred sixty-nine".