78961105178 has 16 divisors (see below), whose sum is σ = 119561559840. Its totient is φ = 39107332176.

The previous prime is 78961105159. The next prime is 78961105187. The reversal of 78961105178 is 87150116987.

It is a super-3 number, since 3×78961105178³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3066425 + ... + 3092067.

It is an arithmetic number, because the mean of its divisors is an integer number (7472597490).

Almost surely, 2^78961105178 is an apocalyptic number.

78961105178 is a deficient number, since it is larger than the sum of its proper divisors (40600454662).

78961105178 is a wasteful number, since it uses less digits than its factorization.

78961105178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40141.

The product of its (nonzero) digits is 846720, while the sum is 53.

The spelling of 78961105178 in words is "seventy-eight billion, nine hundred sixty-one million, one hundred five thousand, one hundred seventy-eight".