216706425922201 has 4 divisors (see below), whose sum is σ = 229453862741172. Its totient is φ = 203958989103232.

The previous prime is 216706425922193. The next prime is 216706425922253. The reversal of 216706425922201 is 102229524607612.

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 183773920392976 + 32932505529225 = 13556324^2 + 5738685^2 .

It is a cyclic number.

It is not a de Polignac number, because 216706425922201 - 2³ = 216706425922193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216706425922001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6373718409460 + ... + 6373718409493.

It is an arithmetic number, because the mean of its divisors is an integer number (57363465685293).

Almost surely, 2^{216706425922201} is an apocalyptic number.

It is an amenable number.

216706425922201 is a deficient number, since it is larger than the sum of its proper divisors (12747436818971).

216706425922201 is a wasteful number, since it uses less digits than its factorization.

216706425922201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747436818970.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 216706425922201 in words is "two hundred sixteen trillion, seven hundred six billion, four hundred twenty-five million, nine hundred twenty-two thousand, two hundred one".