77899228716 has 12 divisors (see below), whose sum is σ = 181764867032. Its totient is φ = 25966409568.

The previous prime is 77899228697. The next prime is 77899228717. The reversal of 77899228716 is 61782299877.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (77899228717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245801185 + ... + 3245801208.

Almost surely, 2^77899228716 is an apocalyptic number.

It is an amenable number.

77899228716 is an abundant number, since it is smaller than the sum of its proper divisors (103865638316).

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

77899228716 is a wasteful number, since it uses less digits than its factorization.

77899228716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491602400 (or 6491602398 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 66.

It can be divided in two parts, 778992 and 28716, that added together give a palindrome (807708).

The spelling of 77899228716 in words is "seventy-seven billion, eight hundred ninety-nine million, two hundred twenty-eight thousand, seven hundred sixteen".