78961105186 has 16 divisors (see below), whose sum is σ = 120283659936. Its totient is φ = 38867279616.

The previous prime is 78961105159. The next prime is 78961105187. The reversal of 78961105186 is 68150116987.

It is a super-3 number, since 3×78961105186³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78961105187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36930 + ... + 399106.

It is an arithmetic number, because the mean of its divisors is an integer number (7517728746).

Almost surely, 2^78961105186 is an apocalyptic number.

78961105186 is a deficient number, since it is larger than the sum of its proper divisors (41322554750).

78961105186 is a wasteful number, since it uses less digits than its factorization.

78961105186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363873.

The product of its (nonzero) digits is 725760, while the sum is 52.

The spelling of 78961105186 in words is "seventy-eight billion, nine hundred sixty-one million, one hundred five thousand, one hundred eighty-six".