69091728289 has 2 divisors, whose sum is σ = 69091728290. Its totient is φ = 69091728288.

The previous prime is 69091728283. The next prime is 69091728373. The reversal of 69091728289 is 98282719096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49469321889 + 19622406400 = 222417^2 + 140080^2 .

It is a cyclic number.

It is not a de Polignac number, because 69091728289 - 2²³ = 69083339681 is a prime.

It is a super-2 number, since 2×69091728289² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69091728283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34545864144 + 34545864145.

It is an arithmetic number, because the mean of its divisors is an integer number (34545864145).

Almost surely, 2^69091728289 is an apocalyptic number.

It is an amenable number.

69091728289 is a deficient number, since it is larger than the sum of its proper divisors (1).

69091728289 is an equidigital number, since it uses as much as digits as its factorization.

69091728289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 69091728289 in words is "sixty-nine billion, ninety-one million, seven hundred twenty-eight thousand, two hundred eighty-nine".