81735682 has 16 divisors (see below), whose sum is σ = 147493440. Its totient is φ = 33185808.

The previous prime is 81735653. The next prime is 81735713. The reversal of 81735682 is 28653718.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153373 + ... + 153904.

It is an arithmetic number, because the mean of its divisors is an integer number (9218340).

Almost surely, 2^81735682 is an apocalyptic number.

81735682 is a deficient number, since it is larger than the sum of its proper divisors (65757758).

81735682 is a wasteful number, since it uses less digits than its factorization.

81735682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307305.

The product of its digits is 80640, while the sum is 40.

The square root of 81735682 is about 9040.7788381311. The cubic root of 81735682 is about 433.9808474775.

The spelling of 81735682 in words is "eighty-one million, seven hundred thirty-five thousand, six hundred eighty-two".