78557112340 has 96 divisors (see below), whose sum is σ = 200315566080. Its totient is φ = 25277733504.

The previous prime is 78557112311. The next prime is 78557112343. The reversal of 78557112340 is 4321175587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78557112343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146617 + ... + 422623.

It is an arithmetic number, because the mean of its divisors is an integer number (2086620480).

Almost surely, 2^78557112340 is an apocalyptic number.

78557112340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78557112340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100157783040).

78557112340 is an abundant number, since it is smaller than the sum of its proper divisors (121758453740).

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

78557112340 is a wasteful number, since it uses less digits than its factorization.

78557112340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276149 (or 276147 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 78557112340 in words is "seventy-eight billion, five hundred fifty-seven million, one hundred twelve thousand, three hundred forty".