216626143505 has 8 divisors (see below), whose sum is σ = 259960732992. Its totient is φ = 173294674288.

The previous prime is 216626143499. The next prime is 216626143523. The reversal of 216626143505 is 505341626612.

It is a happy number.

216626143505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216626143505 - 2¹⁴ = 216626127121 is a prime.

It is a Duffinian 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, 624509 + ... + 907338.

It is an arithmetic number, because the mean of its divisors is an integer number (32495091624).

Almost surely, 2^216626143505 is an apocalyptic number.

It is an amenable number.

216626143505 is a deficient number, since it is larger than the sum of its proper divisors (43334589487).

216626143505 is a wasteful number, since it uses less digits than its factorization.

216626143505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560135.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 216626143505 in words is "two hundred sixteen billion, six hundred twenty-six million, one hundred forty-three thousand, five hundred five".