216204762489 has 4 divisors (see below), whose sum is σ = 288273016656. Its totient is φ = 144136508324.

The previous prime is 216204762481. The next prime is 216204762503. The reversal of 216204762489 is 984267402612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216204762489 - 2³ = 216204762481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216204762481) 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, 36034127079 + ... + 36034127084.

It is an arithmetic number, because the mean of its divisors is an integer number (72068254164).

Almost surely, 2^216204762489 is an apocalyptic number.

It is an amenable number.

216204762489 is a deficient number, since it is larger than the sum of its proper divisors (72068254167).

216204762489 is an equidigital number, since it uses as much as digits as its factorization.

216204762489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72068254166.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 216204762489 in words is "two hundred sixteen billion, two hundred four million, seven hundred sixty-two thousand, four hundred eighty-nine".