80776920692 has 24 divisors (see below), whose sum is σ = 153740699112.
Its totient is φ = 36912528000.
The previous prime is 80776920683. The next prime is 80776920727. The reversal of 80776920692 is 29602967708.
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 17380730896 + 63396189796 = 131836^2 + 251786^2
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7684859 + ... + 7695362.
It is an arithmetic number, because the mean of its divisors is an integer number (6405862463).
Almost surely, 280776920692 is an apocalyptic number.
It is an amenable number.
80776920692 is a deficient number, since it is larger than the sum of its proper divisors (72963778420).
80776920692 is a wasteful number, since it uses less digits than its factorization.
80776920692 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15380339 (or 15380337 counting only the distinct ones).
The product of its (nonzero) digits is 4572288, while the sum is 56.
The spelling of 80776920692 in words is "eighty billion, seven hundred seventy-six million, nine hundred twenty thousand, six hundred ninety-two".