81335653318 has 8 divisors (see below), whose sum is σ = 122004737712. Its totient is φ = 40667407416.

The previous prime is 81335653291. The next prime is 81335653327.

81335653318 is nontrivially palindromic in base 10.

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

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, 171396 + ... + 438232.

It is an arithmetic number, because the mean of its divisors is an integer number (15250592214).

Almost surely, 2^81335653318 is an apocalyptic number.

81335653318 is a deficient number, since it is larger than the sum of its proper divisors (40669084394).

81335653318 is a wasteful number, since it uses less digits than its factorization.

81335653318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419246.

The product of its digits is 777600, while the sum is 46.

The spelling of 81335653318 in words is "eighty-one billion, three hundred thirty-five million, six hundred fifty-three thousand, three hundred eighteen".