77343238782 has 96 divisors (see below), whose sum is σ = 178774596000. Its totient is φ = 24096890880.

The previous prime is 77343238697. The next prime is 77343238789. The reversal of 77343238782 is 28783234377.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77343238789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8979694 + ... + 8988302.

It is an arithmetic number, because the mean of its divisors is an integer number (1862235375).

Almost surely, 2^77343238782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77343238782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89387298000).

77343238782 is an abundant number, since it is smaller than the sum of its proper divisors (101431357218).

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

77343238782 is a wasteful number, since it uses less digits than its factorization.

77343238782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8986 (or 8983 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 54.

The spelling of 77343238782 in words is "seventy-seven billion, three hundred forty-three million, two hundred thirty-eight thousand, seven hundred eighty-two".