81089758 has 16 divisors (see below), whose sum is σ = 130763520. Its totient is φ = 37592856.

The previous prime is 81089753. The next prime is 81089783. The reversal of 81089758 is 85798018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81089753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20916 + ... + 24487.

It is an arithmetic number, because the mean of its divisors is an integer number (8172720).

Almost surely, 2^81089758 is an apocalyptic number.

81089758 is a deficient number, since it is larger than the sum of its proper divisors (49673762).

81089758 is a wasteful number, since it uses less digits than its factorization.

81089758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45471.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 81089758 is about 9004.9851748906. The cubic root of 81089758 is about 432.8346311534.

The spelling of 81089758 in words is "eighty-one million, eighty-nine thousand, seven hundred fifty-eight".