81010365 has 16 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 43167872.

The previous prime is 81010343. The next prime is 81010367. The reversal of 81010365 is 56301018.

It is a cyclic number.

It is not a de Polignac number, because 81010365 - 2⁹ = 81009853 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81010367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28321 + ... + 31049.

It is an arithmetic number, because the mean of its divisors is an integer number (8108100).

Almost surely, 2^81010365 is an apocalyptic number.

It is an amenable number.

81010365 is a deficient number, since it is larger than the sum of its proper divisors (48719235).

81010365 is a wasteful number, since it uses less digits than its factorization.

81010365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 81010365 is about 9000.5758149132. The cubic root of 81010365 is about 432.6933257579.

It can be divided in two parts, 810 and 10365, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 81010365 in words is "eighty-one million, ten thousand, three hundred sixty-five".