78447168543 has 4 divisors (see below), whose sum is σ = 104596224728. Its totient is φ = 52298112360.

The previous prime is 78447168529. The next prime is 78447168587. The reversal of 78447168543 is 34586174487.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78447168543 - 2⁹ = 78447168031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78447168743) 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 3 ways as a sum of consecutive naturals, for example, 13074528088 + ... + 13074528093.

It is an arithmetic number, because the mean of its divisors is an integer number (26149056182).

Almost surely, 2^78447168543 is an apocalyptic number.

78447168543 is a deficient number, since it is larger than the sum of its proper divisors (26149056185).

78447168543 is a wasteful number, since it uses less digits than its factorization.

78447168543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26149056184.

The product of its digits is 18063360, while the sum is 57.

The spelling of 78447168543 in words is "seventy-eight billion, four hundred forty-seven million, one hundred sixty-eight thousand, five hundred forty-three".