81053883538 has 8 divisors (see below), whose sum is σ = 121582181232. Its totient is φ = 40526489796.

The previous prime is 81053883457. The next prime is 81053883541. The reversal of 81053883538 is 83538835018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 82281 + ... + 410947.

It is an arithmetic number, because the mean of its divisors is an integer number (15197772654).

Almost surely, 2^81053883538 is an apocalyptic number.

81053883538 is a deficient number, since it is larger than the sum of its proper divisors (40528297694).

81053883538 is a wasteful number, since it uses less digits than its factorization.

81053883538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451976.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 81053883538 in words is "eighty-one billion, fifty-three million, eight hundred eighty-three thousand, five hundred thirty-eight".