216644363446612 has 12 divisors (see below), whose sum is σ = 380754793269396. Its totient is φ = 107857279655360.

The previous prime is 216644363446583. The next prime is 216644363446631.

216644363446612 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 72228479602756 + 144415883843856 = 8498734^2 + 12017316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116225515939 + ... + 116225517802.

It is an arithmetic number, because the mean of its divisors is an integer number (31729566105783).

Almost surely, 2^{216644363446612} is an apocalyptic number.

It is an amenable number.

216644363446612 is a deficient number, since it is larger than the sum of its proper divisors (164110429822784).

216644363446612 is a wasteful number, since it uses less digits than its factorization.

216644363446612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232451033978 (or 232451033976 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 58.

The spelling of 216644363446612 in words is "two hundred sixteen trillion, six hundred forty-four billion, three hundred sixty-three million, four hundred forty-six thousand, six hundred twelve".