18168084036778 has 16 divisors (see below), whose sum is σ = 29845874691360. Its totient is φ = 8243146341936.

The previous prime is 18168084036769. The next prime is 18168084036787. The reversal of 18168084036778 is 87763048086181.

It is an interprime number because it is at equal distance from previous prime (18168084036769) and next prime (18168084036787).

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, 5921799000 + ... + 5921802067.

It is an arithmetic number, because the mean of its divisors is an integer number (1865367168210).

Almost surely, 2^{18168084036778} is an apocalyptic number.

18168084036778 is a deficient number, since it is larger than the sum of its proper divisors (11677790654582).

18168084036778 is a wasteful number, since it uses less digits than its factorization.

18168084036778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843601141.

The product of its (nonzero) digits is 86704128, while the sum is 67.

The spelling of 18168084036778 in words is "eighteen trillion, one hundred sixty-eight billion, eighty-four million, thirty-six thousand, seven hundred seventy-eight".