216683353506 has 64 divisors (see below), whose sum is σ = 460513382400. Its totient is φ = 67734374400.

The previous prime is 216683353493. The next prime is 216683353511. The reversal of 216683353506 is 605353386612.

216683353506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 46606270 + ... + 46610918.

It is an arithmetic number, because the mean of its divisors is an integer number (7195521600).

Almost surely, 2^216683353506 is an apocalyptic number.

216683353506 is an abundant number, since it is smaller than the sum of its proper divisors (243830028894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216683353506 is a wasteful number, since it uses less digits than its factorization.

216683353506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 216683353506 in words is "two hundred sixteen billion, six hundred eighty-three million, three hundred fifty-three thousand, five hundred six".