81333093453 has 8 divisors (see below), whose sum is σ = 109517829216. Its totient is φ = 53685210000.

The previous prime is 81333093449. The next prime is 81333093481. The reversal of 81333093453 is 35439033318.

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

It is not a de Polignac number, because 81333093453 - 2² = 81333093449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81333091453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134212723 + ... + 134213328.

It is an arithmetic number, because the mean of its divisors is an integer number (13689728652).

Almost surely, 2^81333093453 is an apocalyptic number.

It is an amenable number.

81333093453 is a deficient number, since it is larger than the sum of its proper divisors (28184735763).

81333093453 is a wasteful number, since it uses less digits than its factorization.

81333093453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268426155.

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 81333093453 in words is "eighty-one billion, three hundred thirty-three million, ninety-three thousand, four hundred fifty-three".