765416261 has 4 divisors (see below), whose sum is σ = 772569792. Its totient is φ = 758262732.

The previous prime is 765416243. The next prime is 765416357. The reversal of 765416261 is 162614567.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162614567 = 5573 ⋅29179.

It is a cyclic number.

It is not a de Polignac number, because 765416261 - 2²⁶ = 698307397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765416231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3576605 + ... + 3576818.

It is an arithmetic number, because the mean of its divisors is an integer number (193142448).

Almost surely, 2^765416261 is an apocalyptic number.

It is an amenable number.

765416261 is a deficient number, since it is larger than the sum of its proper divisors (7153531).

765416261 is a wasteful number, since it uses less digits than its factorization.

765416261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7153530.

The product of its digits is 60480, while the sum is 38.

The square root of 765416261 is about 27666.1573226207. The cubic root of 765416261 is about 914.7432809215.

The spelling of 765416261 in words is "seven hundred sixty-five million, four hundred sixteen thousand, two hundred sixty-one".