216752208669 has 6 divisors (see below), whose sum is σ = 313086523646. Its totient is φ = 144501472440.

The previous prime is 216752208653. The next prime is 216752208689. The reversal of 216752208669 is 966802257612.

216752208669 is a `hidden beast` number, since 216 + 75 + 220 + 86 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 137650646169 + 79101562500 = 371013^2 + 281250^2 .

It is not a de Polignac number, because 216752208669 - 2⁴ = 216752208653 is a prime.

It is a super-2 number, since 2×216752208669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216752208689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12041789362 + ... + 12041789379.

Almost surely, 2^216752208669 is an apocalyptic number.

It is an amenable number.

216752208669 is a deficient number, since it is larger than the sum of its proper divisors (96334314977).

216752208669 is a wasteful number, since it uses less digits than its factorization.

216752208669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24083578747 (or 24083578744 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 216752208669 in words is "two hundred sixteen billion, seven hundred fifty-two million, two hundred eight thousand, six hundred sixty-nine".