2208008767969 has 3 divisors (see below), whose sum is σ = 2208010253907. Its totient is φ = 2208007282032.

The previous prime is 2208008767919. The next prime is 2208008768023. The reversal of 2208008767969 is 9697678008022.

The square root of 2208008767969 is 1485937.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 302747550625 + 1905261217344 = 550225^2 + 1380312^2 .

It is not a de Polignac number, because 2208008767969 - 2²¹ = 2208006670817 is a prime.

It is a super-2 number, since 2×2208008767969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2208008767969.

It is not an unprimeable number, because it can be changed into a prime (2208008767919) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 742969 + ... + 2228905.

It is an arithmetic number, because the mean of its divisors is an integer number (736003417969).

Almost surely, 2^{2208008767969} is an apocalyptic number.

2208008767969 is the 1485937-th square number.

2208008767969 is the 742969-th centered octagonal number.

It is an amenable number.

2208008767969 is a deficient number, since it is larger than the sum of its proper divisors (1485938).

2208008767969 is an frugal number, since it uses more digits than its factorization.

2208008767969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971874 (or 1485937 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 64.

Multiplying 2208008767969 by its sum of digits (64), we get a square (141312561150016 = 11887496²).

The spelling of 2208008767969 in words is "two trillion, two hundred eight billion, eight million, seven hundred sixty-seven thousand, nine hundred sixty-nine".