68297027569 has 3 divisors (see below), whose sum is σ = 68297288907. Its totient is φ = 68296766232.

The previous prime is 68297027567. The next prime is 68297027597. The reversal of 68297027569 is 96572079286.

The square root of 68297027569 is 261337.

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., 5853015025 + 62444012544 = 76505^2 + 249888^2 .

It is not a de Polignac number, because 68297027569 - 2¹ = 68297027567 is a prime.

It is a super-2 number, since 2×68297027569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68297027567) 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, 130669 + ... + 392005.

It is an arithmetic number, because the mean of its divisors is an integer number (22765762969).

Almost surely, 2^68297027569 is an apocalyptic number.

68297027569 is the 261337-th square number.

68297027569 is the 130669-th centered octagonal number.

It is an amenable number.

68297027569 is a deficient number, since it is larger than the sum of its proper divisors (261338).

68297027569 is an frugal number, since it uses more digits than its factorization.

68297027569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522674 (or 261337 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 68297027569 in words is "sixty-eight billion, two hundred ninety-seven million, twenty-seven thousand, five hundred sixty-nine".