216334733261 has 2 divisors, whose sum is σ = 216334733262. Its totient is φ = 216334733260.

The previous prime is 216334733239. The next prime is 216334733341. The reversal of 216334733261 is 162337433612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178089064036 + 38245669225 = 422006^2 + 195565^2 .

It is a cyclic number.

It is not a de Polignac number, because 216334733261 - 2¹⁸ = 216334471117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216334733221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108167366630 + 108167366631.

It is an arithmetic number, because the mean of its divisors is an integer number (108167366631).

Almost surely, 2^216334733261 is an apocalyptic number.

It is an amenable number.

216334733261 is a deficient number, since it is larger than the sum of its proper divisors (1).

216334733261 is an equidigital number, since it uses as much as digits as its factorization.

216334733261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 41.

The spelling of 216334733261 in words is "two hundred sixteen billion, three hundred thirty-four million, seven hundred thirty-three thousand, two hundred sixty-one".