78186162216 has 16 divisors (see below), whose sum is σ = 195465405600. Its totient is φ = 26062054064.

The previous prime is 78186162179. The next prime is 78186162217. The reversal of 78186162216 is 61226168187.

It is a super-2 number, since 2×78186162216² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78186162217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628878356 + ... + 1628878403.

It is an arithmetic number, because the mean of its divisors is an integer number (12216587850).

Almost surely, 2^78186162216 is an apocalyptic number.

It is an amenable number.

78186162216 is an abundant number, since it is smaller than the sum of its proper divisors (117279243384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78186162216 is a wasteful number, since it uses less digits than its factorization.

78186162216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257756768 (or 3257756764 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The spelling of 78186162216 in words is "seventy-eight billion, one hundred eighty-six million, one hundred sixty-two thousand, two hundred sixteen".