77912839365 has 32 divisors (see below), whose sum is σ = 130112683776. Its totient is φ = 39737026560.

The previous prime is 77912839331. The next prime is 77912839373. The reversal of 77912839365 is 56393821977.

It is not a de Polignac number, because 77912839365 - 2¹³ = 77912831173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77912839299 and 77912839308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1491285 + ... + 1542645.

It is an arithmetic number, because the mean of its divisors is an integer number (4066021368).

Almost surely, 2^77912839365 is an apocalyptic number.

It is an amenable number.

77912839365 is a deficient number, since it is larger than the sum of its proper divisors (52199844411).

77912839365 is a wasteful number, since it uses less digits than its factorization.

77912839365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55789.

The product of its digits is 17146080, while the sum is 60.

The spelling of 77912839365 in words is "seventy-seven billion, nine hundred twelve million, eight hundred thirty-nine thousand, three hundred sixty-five".