77398709222779 has 8 divisors (see below), whose sum is σ = 89667389158880. Its totient is φ = 65432959655616.

The previous prime is 77398709222761. The next prime is 77398709222833. The reversal of 77398709222779 is 97722290789377.

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

It is not a de Polignac number, because 77398709222779 - 2¹⁷ = 77398709091707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77398709222699 and 77398709222708.

It is not an unprimeable number, because it can be changed into a prime (77398709202779) 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, 75732591684 + ... + 75732592705.

It is an arithmetic number, because the mean of its divisors is an integer number (11208423644860).

Almost surely, 2^{77398709222779} is an apocalyptic number.

77398709222779 is a deficient number, since it is larger than the sum of its proper divisors (12268679936101).

77398709222779 is a wasteful number, since it uses less digits than its factorization.

77398709222779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151465184469.

The product of its (nonzero) digits is 2352442176, while the sum is 79.

The spelling of 77398709222779 in words is "seventy-seven trillion, three hundred ninety-eight billion, seven hundred nine million, two hundred twenty-two thousand, seven hundred seventy-nine".