78547981179 has 16 divisors (see below), whose sum is σ = 107680978944. Its totient is φ = 50899579200.

The previous prime is 78547981151. The next prime is 78547981189. The reversal of 78547981179 is 97118974587.

It is not a de Polignac number, because 78547981179 - 2⁵ = 78547981147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78547981139) 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, 1144899 + ... + 1211564.

It is an arithmetic number, because the mean of its divisors is an integer number (6730061184).

Almost surely, 2^78547981179 is an apocalyptic number.

78547981179 is a deficient number, since it is larger than the sum of its proper divisors (29132997765).

78547981179 is a wasteful number, since it uses less digits than its factorization.

78547981179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356778.

The product of its digits is 35562240, while the sum is 66.

The spelling of 78547981179 in words is "seventy-eight billion, five hundred forty-seven million, nine hundred eighty-one thousand, one hundred seventy-nine".