216615656336 has 10 divisors (see below), whose sum is σ = 419692834182. Its totient is φ = 108307828160.

The previous prime is 216615656321. The next prime is 216615656351. The reversal of 216615656336 is 633656516612.

216615656336 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 (216615656321) and next prime (216615656351).

It can be written as a sum of positive squares in only one way, i.e., 183745966336 + 32869690000 = 428656^2 + 181300^2 .

It is a super-6 number, since 6×216615656336⁶ (a number of 69 digits) contains 666666 as substring.

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 as a sum of consecutive naturals, namely, 6769239245 + ... + 6769239276.

Almost surely, 2^216615656336 is an apocalyptic number.

It is an amenable number.

216615656336 is a deficient number, since it is larger than the sum of its proper divisors (203077177846).

216615656336 is a wasteful number, since it uses less digits than its factorization.

216615656336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13538478529 (or 13538478523 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 50.

The spelling of 216615656336 in words is "two hundred sixteen billion, six hundred fifteen million, six hundred fifty-six thousand, three hundred thirty-six".