81769196 has 24 divisors (see below), whose sum is σ = 149197440. Its totient is φ = 39168000.

The previous prime is 81769153. The next prime is 81769243. The reversal of 81769196 is 69196718.

It is a self number, because there is not a number n which added to its sum of digits gives 81769196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9260 + ... + 15788.

It is an arithmetic number, because the mean of its divisors is an integer number (6216560).

Almost surely, 2^81769196 is an apocalyptic number.

It is an amenable number.

81769196 is a deficient number, since it is larger than the sum of its proper divisors (67428244).

81769196 is a wasteful number, since it uses less digits than its factorization.

81769196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665 (or 6663 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 81769196 is about 9042.6321389295. The cubic root of 81769196 is about 434.0401542834.

The spelling of 81769196 in words is "eighty-one million, seven hundred sixty-nine thousand, one hundred ninety-six".