216334434663 has 16 divisors (see below), whose sum is σ = 337363641600. Its totient is φ = 136632274200.

The previous prime is 216334434649. The next prime is 216334434683. The reversal of 216334434663 is 366434433612.

216334434663 is a `hidden beast` number, since 2 + 1 + 633 + 4 + 4 + 3 + 4 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 216334434663 - 2¹⁰ = 216334433639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216334434683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210851763 + ... + 210852788.

It is an arithmetic number, because the mean of its divisors is an integer number (21085227600).

Almost surely, 2^216334434663 is an apocalyptic number.

216334434663 is a deficient number, since it is larger than the sum of its proper divisors (121029206937).

216334434663 is a wasteful number, since it uses less digits than its factorization.

216334434663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421704579 (or 421704573 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 45.

The spelling of 216334434663 in words is "two hundred sixteen billion, three hundred thirty-four million, four hundred thirty-four thousand, six hundred sixty-three".