12017816678 has 16 divisors (see below), whose sum is σ = 20606897664. Its totient is φ = 5149261320.

The previous prime is 12017816663. The next prime is 12017816683. The reversal of 12017816678 is 87661871021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40700 + ... + 160287.

It is an arithmetic number, because the mean of its divisors is an integer number (1287931104).

Almost surely, 2^12017816678 is an apocalyptic number.

12017816678 is a deficient number, since it is larger than the sum of its proper divisors (8589080986).

12017816678 is a wasteful number, since it uses less digits than its factorization.

12017816678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205267.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 12017816678 in words is "twelve billion, seventeen million, eight hundred sixteen thousand, six hundred seventy-eight".