81268186342133 has 8 divisors (see below), whose sum is σ = 96080614394880. Its totient is φ = 67256430076080.

The previous prime is 81268186342111. The next prime is 81268186342151. The reversal of 81268186342133 is 33124368186218.

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

It is not a de Polignac number, because 81268186342133 - 2²⁰ = 81268185293557 is a prime.

It is a super-2 number, since 2×81268186342133² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81268186342183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200167946453 + ... + 200167946858.

It is an arithmetic number, because the mean of its divisors is an integer number (12010076799360).

Almost surely, 2^{81268186342133} is an apocalyptic number.

It is an amenable number.

81268186342133 is a deficient number, since it is larger than the sum of its proper divisors (14812428052747).

81268186342133 is a wasteful number, since it uses less digits than its factorization.

81268186342133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400335893347.

The product of its digits is 7962624, while the sum is 56.

The spelling of 81268186342133 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred eighty-six million, three hundred forty-two thousand, one hundred thirty-three".