216171151667 has 4 divisors (see below), whose sum is σ = 223144414656. Its totient is φ = 209197888680.

The previous prime is 216171151661. The next prime is 216171151697. The reversal of 216171151667 is 766151171612.

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

It is a cyclic number.

It is not a de Polignac number, because 216171151667 - 2³⁰ = 215097409843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216171151661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486631448 + ... + 3486631509.

It is an arithmetic number, because the mean of its divisors is an integer number (55786103664).

Almost surely, 2^216171151667 is an apocalyptic number.

216171151667 is a deficient number, since it is larger than the sum of its proper divisors (6973262989).

216171151667 is an equidigital number, since it uses as much as digits as its factorization.

216171151667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973262988.

The product of its digits is 105840, while the sum is 44.

The spelling of 216171151667 in words is "two hundred sixteen billion, one hundred seventy-one million, one hundred fifty-one thousand, six hundred sixty-seven".