77786383616844 has 192 divisors, whose sum is σ = 219593256960000. Its totient is φ = 20957389915392.

The previous prime is 77786383616831. The next prime is 77786383616867. The reversal of 77786383616844 is 44861638368777.

It is a self number, because there is not a number n which added to its sum of digits gives 77786383616844.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1466340729 + ... + 1466393775.

It is an arithmetic number, because the mean of its divisors is an integer number (1143714880000).

Almost surely, 2^{77786383616844} 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 77786383616844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109796628480000).

77786383616844 is an abundant number, since it is smaller than the sum of its proper divisors (141806873343156).

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

77786383616844 is a wasteful number, since it uses less digits than its factorization.

77786383616844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67132 (or 67130 counting only the distinct ones).

The product of its digits is 5462360064, while the sum is 78.

The spelling of 77786383616844 in words is "seventy-seven trillion, seven hundred eighty-six billion, three hundred eighty-three million, six hundred sixteen thousand, eight hundred forty-four".