81395676 has 36 divisors (see below), whose sum is σ = 206040744. Its totient is φ = 27093600.

The previous prime is 81395653. The next prime is 81395683. The reversal of 81395676 is 67659318.

It is a happy number.

81395676 is a `hidden beast` number, since 81 + 3 + 9 + 567 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37131 + ... + 39261.

It is an arithmetic number, because the mean of its divisors is an integer number (5723354).

Almost surely, 2^81395676 is an apocalyptic number.

It is an amenable number.

81395676 is an abundant number, since it is smaller than the sum of its proper divisors (124645068).

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

81395676 is a wasteful number, since it uses less digits than its factorization.

81395676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202 (or 3197 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 81395676 is about 9021.9552204608. The cubic root of 81395676 is about 433.3782499134.

The spelling of 81395676 in words is "eighty-one million, three hundred ninety-five thousand, six hundred seventy-six".