81036826 has 16 divisors (see below), whose sum is σ = 131077800. Its totient is φ = 37352448.

The previous prime is 81036793. The next prime is 81036827. The reversal of 81036826 is 62863018.

It can be written as a sum of positive squares in 4 ways, for example, as 66406201 + 14630625 = 8149^2 + 3825^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81036791 and 81036800.

It is not an unprimeable number, because it can be changed into a prime (81036827) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24690 + ... + 27778.

Almost surely, 2^81036826 is an apocalyptic number.

81036826 is a deficient number, since it is larger than the sum of its proper divisors (50040974).

81036826 is a wasteful number, since it uses less digits than its factorization.

81036826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 81036826 is about 9002.0456564050. The cubic root of 81036826 is about 432.7404318770.

It can be divided in two parts, 810 and 36826, that added together give a square (37636 = 194²).

The spelling of 81036826 in words is "eighty-one million, thirty-six thousand, eight hundred twenty-six".