81027002639161 has 8 divisors (see below), whose sum is σ = 81097376484960. Its totient is φ = 80956630003872.

The previous prime is 81027002639159. The next prime is 81027002639171. The reversal of 81027002639161 is 16193620072018.

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

It is a cyclic number.

It is not a de Polignac number, because 81027002639161 - 2¹ = 81027002639159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81027002639171) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 180283626 + ... + 180732508.

It is an arithmetic number, because the mean of its divisors is an integer number (10137172060620).

Almost surely, 2^{81027002639161} is an apocalyptic number.

It is an amenable number.

81027002639161 is a deficient number, since it is larger than the sum of its proper divisors (70373845799).

81027002639161 is a wasteful number, since it uses less digits than its factorization.

81027002639161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605255.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 81027002639161 in words is "eighty-one trillion, twenty-seven billion, two million, six hundred thirty-nine thousand, one hundred sixty-one".