81353696 has 24 divisors (see below), whose sum is σ = 160504344. Its totient is φ = 40590720.

The previous prime is 81353689. The next prime is 81353707. The reversal of 81353696 is 69635318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14306 + ... + 19166.

It is an arithmetic number, because the mean of its divisors is an integer number (6687681).

Almost surely, 2^81353696 is an apocalyptic number.

It is an amenable number.

81353696 is a deficient number, since it is larger than the sum of its proper divisors (79150648).

81353696 is a wasteful number, since it uses less digits than its factorization.

81353696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5394 (or 5386 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 81353696 is about 9019.6283737192. The cubic root of 81353696 is about 433.3037318372.

The spelling of 81353696 in words is "eighty-one million, three hundred fifty-three thousand, six hundred ninety-six".