78731831344 has 20 divisors (see below), whose sum is σ = 157803024960. Its totient is φ = 38008470080.

The previous prime is 78731831341. The next prime is 78731831351. The reversal of 78731831344 is 44313813787.

It is not an unprimeable number, because it can be changed into a prime (78731831341) 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 3 ways as a sum of consecutive naturals, for example, 84839872 + ... + 84840799.

It is an arithmetic number, because the mean of its divisors is an integer number (7890151248).

Almost surely, 2^78731831344 is an apocalyptic number.

It is an amenable number.

78731831344 is an abundant number, since it is smaller than the sum of its proper divisors (79071193616).

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

78731831344 is a wasteful number, since it uses less digits than its factorization.

78731831344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169680708 (or 169680702 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The spelling of 78731831344 in words is "seventy-eight billion, seven hundred thirty-one million, eight hundred thirty-one thousand, three hundred forty-four".