216979011623 has 8 divisors (see below), whose sum is σ = 238511281536. Its totient is φ = 195747892600.

The previous prime is 216979011611. The next prime is 216979011649. The reversal of 216979011623 is 326110979612.

216979011623 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 216979011623 - 2⁸ = 216979011367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216979011023) by changing a digit.

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, 75286211 + ... + 75289092.

It is an arithmetic number, because the mean of its divisors is an integer number (29813910192).

Almost surely, 2^216979011623 is an apocalyptic number.

216979011623 is a deficient number, since it is larger than the sum of its proper divisors (21532269913).

216979011623 is a wasteful number, since it uses less digits than its factorization.

216979011623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150575445.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 216979011623 in words is "two hundred sixteen billion, nine hundred seventy-nine million, eleven thousand, six hundred twenty-three".