765135361 has 4 divisors (see below), whose sum is σ = 765402372. Its totient is φ = 764868352.

The previous prime is 765135353. The next prime is 765135367. The reversal of 765135361 is 163531567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163531567 = 733 ⋅223099.

It can be written as a sum of positive squares in 2 ways, for example, as 43890625 + 721244736 = 6625^2 + 26856^2 .

It is a cyclic number.

It is not a de Polignac number, because 765135361 - 2³ = 765135353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 765135361.

It is not an unprimeable number, because it can be changed into a prime (765135367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129160 + ... + 134953.

It is an arithmetic number, because the mean of its divisors is an integer number (191350593).

Almost surely, 2^765135361 is an apocalyptic number.

It is an amenable number.

765135361 is a deficient number, since it is larger than the sum of its proper divisors (267011).

765135361 is a wasteful number, since it uses less digits than its factorization.

765135361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267010.

The product of its digits is 56700, while the sum is 37.

The square root of 765135361 is about 27661.0802572857. The cubic root of 765135361 is about 914.6313667297.

The spelling of 765135361 in words is "seven hundred sixty-five million, one hundred thirty-five thousand, three hundred sixty-one".