78845281770 has 32 divisors (see below), whose sum is σ = 189319757760. Its totient is φ = 21015288320.

The previous prime is 78845281741. The next prime is 78845281771. The reversal of 78845281770 is 7718254887.

It is a self number, because there is not a number n which added to its sum of digits gives 78845281770.

It is not an unprimeable number, because it can be changed into a prime (78845281771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569040 + ... + 693899.

It is an arithmetic number, because the mean of its divisors is an integer number (5916242430).

Almost surely, 2^78845281770 is an apocalyptic number.

78845281770 is an abundant number, since it is smaller than the sum of its proper divisors (110474475990).

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

78845281770 is a wasteful number, since it uses less digits than its factorization.

78845281770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265030.

The product of its (nonzero) digits is 7024640, while the sum is 57.

The spelling of 78845281770 in words is "seventy-eight billion, eight hundred forty-five million, two hundred eighty-one thousand, seven hundred seventy".