77969062289 has 4 divisors (see below), whose sum is σ = 79247243700. Its totient is φ = 76690880880.

The previous prime is 77969062273. The next prime is 77969062337. The reversal of 77969062289 is 98226096977.

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 9563275264 + 68405787025 = 97792^2 + 261545^2 .

It is a cyclic number.

It is not a de Polignac number, because 77969062289 - 2⁴ = 77969062273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77969062189) 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, 639090614 + ... + 639090735.

It is an arithmetic number, because the mean of its divisors is an integer number (19811810925).

Almost surely, 2^77969062289 is an apocalyptic number.

It is an amenable number.

77969062289 is a deficient number, since it is larger than the sum of its proper divisors (1278181411).

77969062289 is a wasteful number, since it uses less digits than its factorization.

77969062289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278181410.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 77969062289 in words is "seventy-seven billion, nine hundred sixty-nine million, sixty-two thousand, two hundred eighty-nine".