81089151757 has 2 divisors, whose sum is σ = 81089151758. Its totient is φ = 81089151756.

The previous prime is 81089151733. The next prime is 81089151799. The reversal of 81089151757 is 75715198018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43817374276 + 37271777481 = 209326^2 + 193059^2 .

It is a cyclic number.

It is not a de Polignac number, because 81089151757 - 2¹¹ = 81089149709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81089151707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40544575878 + 40544575879.

It is an arithmetic number, because the mean of its divisors is an integer number (40544575879).

Almost surely, 2^81089151757 is an apocalyptic number.

It is an amenable number.

81089151757 is a deficient number, since it is larger than the sum of its proper divisors (1).

81089151757 is an equidigital number, since it uses as much as digits as its factorization.

81089151757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 52.

The spelling of 81089151757 in words is "eighty-one billion, eighty-nine million, one hundred fifty-one thousand, seven hundred fifty-seven".