81001182742338 has 8 divisors (see below), whose sum is σ = 162002365484688. Its totient is φ = 27000394247444.

The previous prime is 81001182742313. The next prime is 81001182742373. The reversal of 81001182742338 is 83324728110018.

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

81001182742338 is an admirable number.

It is a super-2 number, since 2×81001182742338² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6750098561856 + ... + 6750098561867.

It is an arithmetic number, because the mean of its divisors is an integer number (20250295685586).

Almost surely, 2^{81001182742338} is an apocalyptic number.

81001182742338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81001182742338 is a wasteful number, since it uses less digits than its factorization.

81001182742338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500197123728.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 81001182742338 in words is "eighty-one trillion, one billion, one hundred eighty-two million, seven hundred forty-two thousand, three hundred thirty-eight".