77829327679 has 4 divisors (see below), whose sum is σ = 77987840040. Its totient is φ = 77670815320.

The previous prime is 77829327671. The next prime is 77829327701. The reversal of 77829327679 is 97672392877.

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

It is a cyclic number.

It is not a de Polignac number, because 77829327679 - 2³ = 77829327671 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 (77829327671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79255444 + ... + 79256425.

It is an arithmetic number, because the mean of its divisors is an integer number (19496960010).

Almost surely, 2^77829327679 is an apocalyptic number.

77829327679 is a deficient number, since it is larger than the sum of its proper divisors (158512361).

77829327679 is a wasteful number, since it uses less digits than its factorization.

77829327679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158512360.

The product of its digits is 112021056, while the sum is 67.

The spelling of 77829327679 in words is "seventy-seven billion, eight hundred twenty-nine million, three hundred twenty-seven thousand, six hundred seventy-nine".