81376186 has 8 divisors (see below), whose sum is σ = 122106240. Its totient is φ = 40674108.

The previous prime is 81376121. The next prime is 81376189. The reversal of 81376186 is 68167318.

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 (81376189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3325 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (15263280).

Almost surely, 2^81376186 is an apocalyptic number.

81376186 is a deficient number, since it is larger than the sum of its proper divisors (40730054).

81376186 is a wasteful number, since it uses less digits than its factorization.

81376186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13988.

The product of its digits is 48384, while the sum is 40.

The square root of 81376186 is about 9020.8750129907. The cubic root of 81376186 is about 433.3436566903.

The spelling of 81376186 in words is "eighty-one million, three hundred seventy-six thousand, one hundred eighty-six".