69069581681 has 2 divisors, whose sum is σ = 69069581682. Its totient is φ = 69069581680.

The previous prime is 69069581653. The next prime is 69069581729. The reversal of 69069581681 is 18618596096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47454701281 + 21614880400 = 217841^2 + 147020^2 .

It is a cyclic number.

It is not a de Polignac number, because 69069581681 - 2¹⁴ = 69069565297 is a prime.

It is a super-2 number, since 2×69069581681² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69069581681.

It is not a weakly prime, because it can be changed into another prime (69069581381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34534790840 + 34534790841.

It is an arithmetic number, because the mean of its divisors is an integer number (34534790841).

Almost surely, 2^69069581681 is an apocalyptic number.

It is an amenable number.

69069581681 is a deficient number, since it is larger than the sum of its proper divisors (1).

69069581681 is an equidigital number, since it uses as much as digits as its factorization.

69069581681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 69069581681 in words is "sixty-nine billion, sixty-nine million, five hundred eighty-one thousand, six hundred eighty-one".