78845281792 has 20 divisors (see below), whose sum is σ = 157536569916.
Its totient is φ = 39422640640.
The previous prime is 78845281771. The next prime is 78845281807. The reversal of 78845281792 is 29718254887.
It is a self number, because there is not a number n which added to its sum of digits gives 78845281792.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76996834 + ... + 76997857.
Almost surely, 278845281792 is an apocalyptic number.
It is an amenable number.
78845281792 is a deficient number, since it is larger than the sum of its proper divisors (78691288124).
78845281792 is an equidigital number, since it uses as much as digits as its factorization.
78845281792 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 153994709 (or 153994693 counting only the distinct ones).
The product of its digits is 18063360, while the sum is 61.
The spelling of 78845281792 in words is "seventy-eight billion, eight hundred forty-five million, two hundred eighty-one thousand, seven hundred ninety-two".