81283842835 has 16 divisors (see below), whose sum is σ = 105144923520. Its totient is φ = 59967169920.

The previous prime is 81283842803. The next prime is 81283842839. The reversal of 81283842835 is 53824838218.

It is not a de Polignac number, because 81283842835 - 2⁵ = 81283842803 is a prime.

It is a super-3 number, since 3×81283842835³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81283842839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534256 + ... + 669325.

It is an arithmetic number, because the mean of its divisors is an integer number (6571557720).

Almost surely, 2^81283842835 is an apocalyptic number.

81283842835 is a deficient number, since it is larger than the sum of its proper divisors (23861080685).

81283842835 is a wasteful number, since it uses less digits than its factorization.

81283842835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204638.

The product of its digits is 2949120, while the sum is 52.

The spelling of 81283842835 in words is "eighty-one billion, two hundred eighty-three million, eight hundred forty-two thousand, eight hundred thirty-five".