81826106 has 8 divisors (see below), whose sum is σ = 123087924. Its totient is φ = 40796800.

The previous prime is 81826093. The next prime is 81826109. The reversal of 81826106 is 60162818.

It can be written as a sum of positive squares in 2 ways, for example, as 69639025 + 12187081 = 8345^2 + 3491^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81826109) 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 3 ways as a sum of consecutive naturals, for example, 57245 + ... + 58656.

Almost surely, 2^81826106 is an apocalyptic number.

81826106 is a deficient number, since it is larger than the sum of its proper divisors (41261818).

81826106 is a wasteful number, since it uses less digits than its factorization.

81826106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116256.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 81826106 is about 9045.7783523586. The cubic root of 81826106 is about 434.1408258405.

The spelling of 81826106 in words is "eighty-one million, eight hundred twenty-six thousand, one hundred six".