216366356446 has 16 divisors (see below), whose sum is σ = 335083230720. Its totient is φ = 104713499520.

The previous prime is 216366356383. The next prime is 216366356509. The reversal of 216366356446 is 644653663612.

216366356446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216366356383) and next prime (216366356509).

It is a junction number, because it is equal to n+sod(n) for n = 216366356393 and 216366356402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10377831 + ... + 10398658.

It is an arithmetic number, because the mean of its divisors is an integer number (20942701920).

Almost surely, 2^216366356446 is an apocalyptic number.

216366356446 is a deficient number, since it is larger than the sum of its proper divisors (118716874274).

216366356446 is a wasteful number, since it uses less digits than its factorization.

216366356446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20776659.

The product of its digits is 11197440, while the sum is 52.

The spelling of 216366356446 in words is "two hundred sixteen billion, three hundred sixty-six million, three hundred fifty-six thousand, four hundred forty-six".