39816218412 has 120 divisors (see below), whose sum is σ = 107792757072. Its totient is φ = 12807849600.

The previous prime is 39816218399. The next prime is 39816218423. The reversal of 39816218412 is 21481261893.

39816218412 is a `hidden beast` number, since 3 + 9 + 8 + 1 + 621 + 8 + 4 + 12 = 666.

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 39 ways as a sum of consecutive naturals, for example, 1028487 + ... + 1066497.

Almost surely, 2^39816218412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39816218412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53896378536).

39816218412 is an abundant number, since it is smaller than the sum of its proper divisors (67976538660).

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

39816218412 is a wasteful number, since it uses less digits than its factorization.

39816218412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38141 (or 38130 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The spelling of 39816218412 in words is "thirty-nine billion, eight hundred sixteen million, two hundred eighteen thousand, four hundred twelve".