69681991581589 has 2 divisors, whose sum is σ = 69681991581590. Its totient is φ = 69681991581588.

The previous prime is 69681991581491. The next prime is 69681991581613. The reversal of 69681991581589 is 98518519918696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69396263915364 + 285727666225 = 8330442^2 + 534535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69681991581589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69681991581689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34840995790794 + 34840995790795.

It is an arithmetic number, because the mean of its divisors is an integer number (34840995790795).

Almost surely, 2^{69681991581589} is an apocalyptic number.

It is an amenable number.

69681991581589 is a deficient number, since it is larger than the sum of its proper divisors (1).

69681991581589 is an equidigital number, since it uses as much as digits as its factorization.

69681991581589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3023308800, while the sum is 85.

The spelling of 69681991581589 in words is "sixty-nine trillion, six hundred eighty-one billion, nine hundred ninety-one million, five hundred eighty-one thousand, five hundred eighty-nine".