81826116 has 12 divisors (see below), whose sum is σ = 190927632. Its totient is φ = 27275368.

The previous prime is 81826109. The next prime is 81826123. The reversal of 81826116 is 61162818.

It is an interprime number because it is at equal distance from previous prime (81826109) and next prime (81826123).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3409410 + ... + 3409433.

It is an arithmetic number, because the mean of its divisors is an integer number (15910636).

Almost surely, 2^81826116 is an apocalyptic number.

It is an amenable number.

81826116 is an abundant number, since it is smaller than the sum of its proper divisors (109101516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81826116 is a wasteful number, since it uses less digits than its factorization.

81826116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6818850 (or 6818848 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 81826116 is about 9045.7789051026. The cubic root of 81826116 is about 434.1408435260.

The spelling of 81826116 in words is "eighty-one million, eight hundred twenty-six thousand, one hundred sixteen".