77908744349 has 8 divisors (see below), whose sum is σ = 77987551680. Its totient is φ = 77829980896.

The previous prime is 77908744301. The next prime is 77908744367. The reversal of 77908744349 is 94344780977.

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

It is a cyclic number.

It is not a de Polignac number, because 77908744349 - 2²⁴ = 77891967133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77908744291 and 77908744300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77908743349) 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 7 ways as a sum of consecutive naturals, for example, 4381094 + ... + 4398840.

It is an arithmetic number, because the mean of its divisors is an integer number (9748443960).

Almost surely, 2^77908744349 is an apocalyptic number.

It is an amenable number.

77908744349 is a deficient number, since it is larger than the sum of its proper divisors (78807331).

77908744349 is a wasteful number, since it uses less digits than its factorization.

77908744349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21939.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 77908744349 in words is "seventy-seven billion, nine hundred eight million, seven hundred forty-four thousand, three hundred forty-nine".