81735848 has 8 divisors (see below), whose sum is σ = 153254730. Its totient is φ = 40867920.

The previous prime is 81735817. The next prime is 81735877. The reversal of 81735848 is 84853718.

It can be written as a sum of positive squares in only one way, i.e., 70593604 + 11142244 = 8402^2 + 3338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 81735799 and 81735808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108483 + ... + 5108498.

Almost surely, 2^81735848 is an apocalyptic number.

It is an amenable number.

81735848 is a deficient number, since it is larger than the sum of its proper divisors (71518882).

81735848 is a wasteful number, since it uses less digits than its factorization.

81735848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216987 (or 10216983 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 81735848 is about 9040.7880187515. The cubic root of 81735848 is about 433.9811412732.

The spelling of 81735848 in words is "eighty-one million, seven hundred thirty-five thousand, eight hundred forty-eight".