81095894 has 12 divisors (see below), whose sum is σ = 133708092. Its totient is φ = 36861660.

The previous prime is 81095887. The next prime is 81095921. The reversal of 81095894 is 49859018.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167312 + ... + 167795.

It is an arithmetic number, because the mean of its divisors is an integer number (11142341).

Almost surely, 2^81095894 is an apocalyptic number.

81095894 is a deficient number, since it is larger than the sum of its proper divisors (52612198).

81095894 is a wasteful number, since it uses less digits than its factorization.

81095894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335131 (or 335120 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 81095894 is about 9005.3258686180. The cubic root of 81095894 is about 432.8455482999.

The spelling of 81095894 in words is "eighty-one million, ninety-five thousand, eight hundred ninety-four".