216416656 has 10 divisors (see below), whose sum is σ = 419307302. Its totient is φ = 108208320.

The previous prime is 216416621. The next prime is 216416671. The reversal of 216416656 is 656614612.

It can be written as a sum of positive squares in only one way, i.e., 109914256 + 106502400 = 10484^2 + 10320^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6763005 + ... + 6763036.

Almost surely, 2^216416656 is an apocalyptic number.

It is an amenable number.

216416656 is a deficient number, since it is larger than the sum of its proper divisors (202890646).

216416656 is a wasteful number, since it uses less digits than its factorization.

216416656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13526049 (or 13526043 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 216416656 is about 14711.1065525337. The cubic root of 216416656 is about 600.3855447982.

The spelling of 216416656 in words is "two hundred sixteen million, four hundred sixteen thousand, six hundred fifty-six".