216613361611 has 2 divisors, whose sum is σ = 216613361612. Its totient is φ = 216613361610.

The previous prime is 216613361593. The next prime is 216613361641. The reversal of 216613361611 is 116163316612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216613361611 - 2¹¹ = 216613359563 is a prime.

It is not a weakly prime, because it can be changed into another prime (216613361641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108306680805 + 108306680806.

It is an arithmetic number, because the mean of its divisors is an integer number (108306680806).

Almost surely, 2^216613361611 is an apocalyptic number.

216613361611 is a deficient number, since it is larger than the sum of its proper divisors (1).

216613361611 is an equidigital number, since it uses as much as digits as its factorization.

216613361611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The spelling of 216613361611 in words is "two hundred sixteen billion, six hundred thirteen million, three hundred sixty-one thousand, six hundred eleven".