217769440489 has 16 divisors (see below), whose sum is σ = 229073644800. Its totient is φ = 206623745856.

The previous prime is 217769440459. The next prime is 217769440507. The reversal of 217769440489 is 984044967712.

217769440489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 217769440489 - 2²⁵ = 217735886057 is a prime.

It is a super-2 number, since 2×217769440489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217769440439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1684447 + ... + 1809115.

It is an arithmetic number, because the mean of its divisors is an integer number (14317102800).

Almost surely, 2^217769440489 is an apocalyptic number.

It is an amenable number.

217769440489 is a deficient number, since it is larger than the sum of its proper divisors (11304204311).

217769440489 is a wasteful number, since it uses less digits than its factorization.

217769440489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125304.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 217769440489 in words is "two hundred seventeen billion, seven hundred sixty-nine million, four hundred forty thousand, four hundred eighty-nine".