77776198764928 has 64 divisors (see below), whose sum is σ = 164074335570720. Its totient is φ = 36597180620800.

The previous prime is 77776198764917. The next prime is 77776198764959. The reversal of 77776198764928 is 82946789167777.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21969453 + ... + 25262803.

Almost surely, 2^{77776198764928} is an apocalyptic number.

It is an amenable number.

77776198764928 is an abundant number, since it is smaller than the sum of its proper divisors (86298136805792).

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

77776198764928 is a wasteful number, since it uses less digits than its factorization.

77776198764928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304235 (or 3304223 counting only the distinct ones).

The product of its digits is 25092716544, while the sum is 88.

The spelling of 77776198764928 in words is "seventy-seven trillion, seven hundred seventy-six billion, one hundred ninety-eight million, seven hundred sixty-four thousand, nine hundred twenty-eight".