78319728783 has 6 divisors (see below), whose sum is σ = 113128497144. Its totient is φ = 52213152516.

The previous prime is 78319728769. The next prime is 78319728793. The reversal of 78319728783 is 38782791387.

It is not a de Polignac number, because 78319728783 - 2¹⁴ = 78319712399 is a prime.

It is a super-2 number, since 2×78319728783² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78319728783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78319728733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4351096035 + ... + 4351096052.

It is an arithmetic number, because the mean of its divisors is an integer number (18854749524).

Almost surely, 2^78319728783 is an apocalyptic number.

78319728783 is a deficient number, since it is larger than the sum of its proper divisors (34808768361).

78319728783 is a wasteful number, since it uses less digits than its factorization.

78319728783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8702192093 (or 8702192090 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The spelling of 78319728783 in words is "seventy-eight billion, three hundred nineteen million, seven hundred twenty-eight thousand, seven hundred eighty-three".