216829054129 has 4 divisors (see below), whose sum is σ = 216878915700. Its totient is φ = 216779192560.

The previous prime is 216829054111. The next prime is 216829054153. The reversal of 216829054129 is 921450928612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19117210225 + 197711843904 = 138265^2 + 444648^2 .

It is a cyclic number.

It is not a de Polignac number, because 216829054129 - 2³⁵ = 182469315761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216829054229) 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 3 ways as a sum of consecutive naturals, for example, 24924262 + ... + 24932959.

It is an arithmetic number, because the mean of its divisors is an integer number (54219728925).

Almost surely, 2^216829054129 is an apocalyptic number.

It is an amenable number.

216829054129 is a deficient number, since it is larger than the sum of its proper divisors (49861571).

216829054129 is an equidigital number, since it uses as much as digits as its factorization.

216829054129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49861570.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 216829054129 in words is "two hundred sixteen billion, eight hundred twenty-nine million, fifty-four thousand, one hundred twenty-nine".