77804734768 has 20 divisors (see below), whose sum is σ = 159614125560. Its totient is φ = 36613992704.

The previous prime is 77804734759. The next prime is 77804734793. The reversal of 77804734768 is 86743740877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143023138 + ... + 143023681.

It is an arithmetic number, because the mean of its divisors is an integer number (7980706278).

Almost surely, 2^77804734768 is an apocalyptic number.

It is an amenable number.

77804734768 is an abundant number, since it is smaller than the sum of its proper divisors (81809390792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77804734768 is a wasteful number, since it uses less digits than its factorization.

77804734768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286046844 (or 286046838 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 61.

The spelling of 77804734768 in words is "seventy-seven billion, eight hundred four million, seven hundred thirty-four thousand, seven hundred sixty-eight".