216770430479 has 4 divisors (see below), whose sum is σ = 217102391976. Its totient is φ = 216438468984.

The previous prime is 216770430467. The next prime is 216770430497. The reversal of 216770430479 is 974034077612.

It is a happy number.

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 216770430479 - 2²⁸ = 216501995023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216770430419) 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, 165979769 + ... + 165981074.

It is an arithmetic number, because the mean of its divisors is an integer number (54275597994).

Almost surely, 2^216770430479 is an apocalyptic number.

216770430479 is a deficient number, since it is larger than the sum of its proper divisors (331961497).

216770430479 is an equidigital number, since it uses as much as digits as its factorization.

216770430479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331961496.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The spelling of 216770430479 in words is "two hundred sixteen billion, seven hundred seventy million, four hundred thirty thousand, four hundred seventy-nine".