77730013856012 has 72 divisors (see below), whose sum is σ = 167625729651744. Its totient is φ = 31338008206848.

The previous prime is 77730013855999. The next prime is 77730013856039. The reversal of 77730013856012 is 21065831003777.

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 23 ways as a sum of consecutive naturals, for example, 1159073 + ... + 12522119.

It is an arithmetic number, because the mean of its divisors is an integer number (2328135134052).

Almost surely, 2^{77730013856012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77730013856012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83812864825872).

77730013856012 is an abundant number, since it is smaller than the sum of its proper divisors (89895715795732).

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

77730013856012 is a wasteful number, since it uses less digits than its factorization.

77730013856012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11365135 (or 11365126 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 50.

Adding to 77730013856012 its reverse (21065831003777), we get a palindrome (98795844859789).

The spelling of 77730013856012 in words is "seventy-seven trillion, seven hundred thirty billion, thirteen million, eight hundred fifty-six thousand, twelve".