216515368436 has 12 divisors (see below), whose sum is σ = 378915079200. Its totient is φ = 108253917240.

The previous prime is 216515368403. The next prime is 216515368439. The reversal of 216515368436 is 634863515612.

It is a happy number.

216515368436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216515368439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810386 + ... + 1043913.

It is an arithmetic number, because the mean of its divisors is an integer number (31576256600).

Almost surely, 2^216515368436 is an apocalyptic number.

It is an amenable number.

216515368436 is a deficient number, since it is larger than the sum of its proper divisors (162399710764).

216515368436 is a wasteful number, since it uses less digits than its factorization.

216515368436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883494 (or 1883492 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The spelling of 216515368436 in words is "two hundred sixteen billion, five hundred fifteen million, three hundred sixty-eight thousand, four hundred thirty-six".