216134263621 has 16 divisors (see below), whose sum is σ = 240943420800. Its totient is φ = 192673548288.

The previous prime is 216134263619. The next prime is 216134263637. The reversal of 216134263621 is 126362431612.

It is a cyclic number.

It is not a de Polignac number, because 216134263621 - 2¹ = 216134263619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216134263021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520821 + ... + 1656853.

It is an arithmetic number, because the mean of its divisors is an integer number (15058963800).

Almost surely, 2^216134263621 is an apocalyptic number.

It is an amenable number.

216134263621 is a deficient number, since it is larger than the sum of its proper divisors (24809157179).

216134263621 is a wasteful number, since it uses less digits than its factorization.

216134263621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140988.

The product of its digits is 62208, while the sum is 37.

The spelling of 216134263621 in words is "two hundred sixteen billion, one hundred thirty-four million, two hundred sixty-three thousand, six hundred twenty-one".