77680173847 has 8 divisors (see below), whose sum is σ = 83240556336. Its totient is φ = 72229898112.

The previous prime is 77680173841. The next prime is 77680173889. The reversal of 77680173847 is 74837108677.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77680173847 - 2⁷ = 77680173719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77680173791 and 77680173800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77680173841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27525228 + ... + 27528049.

It is an arithmetic number, because the mean of its divisors is an integer number (10405069542).

Almost surely, 2^77680173847 is an apocalyptic number.

77680173847 is a deficient number, since it is larger than the sum of its proper divisors (5560382489).

77680173847 is a wasteful number, since it uses less digits than its factorization.

77680173847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55053377.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 77680173847 in words is "seventy-seven billion, six hundred eighty million, one hundred seventy-three thousand, eight hundred forty-seven".