81011170 has 8 divisors (see below), whose sum is σ = 145820124. Its totient is φ = 32404464.

The previous prime is 81011149. The next prime is 81011197. The reversal of 81011170 is 7111018.

It can be written as a sum of positive squares in 2 ways, for example, as 80048809 + 962361 = 8947^2 + 981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4050549 + ... + 4050568.

Almost surely, 2^81011170 is an apocalyptic number.

81011170 is a deficient number, since it is larger than the sum of its proper divisors (64808954).

81011170 is a wasteful number, since it uses less digits than its factorization.

81011170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8101124.

The product of its (nonzero) digits is 56, while the sum is 19.

The square root of 81011170 is about 9000.6205341632. The cubic root of 81011170 is about 432.6947589777.

Adding to 81011170 its reverse (7111018), we get a palindrome (88122188).

The spelling of 81011170 in words is "eighty-one million, eleven thousand, one hundred seventy".