779532769069 has 4 divisors (see below), whose sum is σ = 779560901244. Its totient is φ = 779504636896.

The previous prime is 779532769049. The next prime is 779532769079. The reversal of 779532769069 is 960967235977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 680220810025 + 99311959044 = 824755^2 + 315138^2 .

It is a cyclic number.

It is not a de Polignac number, because 779532769069 - 2¹⁹ = 779532244781 is a prime.

It is a super-2 number, since 2×779532769069² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 779532768989 and 779532769007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779532769049) 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, 14024482 + ... + 14079955.

It is an arithmetic number, because the mean of its divisors is an integer number (194890225311).

Almost surely, 2^779532769069 is an apocalyptic number.

It is an amenable number.

779532769069 is a deficient number, since it is larger than the sum of its proper divisors (28132175).

779532769069 is a wasteful number, since it uses less digits than its factorization.

779532769069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28132174.

The product of its (nonzero) digits is 270050760, while the sum is 70.

The spelling of 779532769069 in words is "seven hundred seventy-nine billion, five hundred thirty-two million, seven hundred sixty-nine thousand, sixty-nine".