81741188 has 12 divisors (see below), whose sum is σ = 143576832. Its totient is φ = 40719240.

The previous prime is 81741181. The next prime is 81741193. The reversal of 81741188 is 88114718.

It is not an unprimeable number, because it can be changed into a prime (81741181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36620 + ... + 38787.

It is an arithmetic number, because the mean of its divisors is an integer number (11964736).

Almost surely, 2^81741188 is an apocalyptic number.

It is an amenable number.

81741188 is a deficient number, since it is larger than the sum of its proper divisors (61835644).

81741188 is a wasteful number, since it uses less digits than its factorization.

81741188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75682 (or 75680 counting only the distinct ones).

The product of its digits is 14336, while the sum is 38.

The square root of 81741188 is about 9041.0833421665. The cubic root of 81741188 is about 433.9905920788.

The spelling of 81741188 in words is "eighty-one million, seven hundred forty-one thousand, one hundred eighty-eight".