77477447684 has 36 divisors (see below), whose sum is σ = 167791405824. Its totient is φ = 30650416992.

The previous prime is 77477447681. The next prime is 77477447689. The reversal of 77477447684 is 48674477477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77477447684.

It is not an unprimeable number, because it can be changed into a prime (77477447681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8181812 + ... + 8191275.

It is an arithmetic number, because the mean of its divisors is an integer number (4660872384).

Almost surely, 2^77477447684 is an apocalyptic number.

It is an amenable number.

77477447684 is an abundant number, since it is smaller than the sum of its proper divisors (90313958140).

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

77477447684 is a wasteful number, since it uses less digits than its factorization.

77477447684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16373124 (or 16373109 counting only the distinct ones).

The product of its digits is 206524416, while the sum is 65.

The spelling of 77477447684 in words is "seventy-seven billion, four hundred seventy-seven million, four hundred forty-seven thousand, six hundred eighty-four".