81136960327 has 8 divisors (see below), whose sum is σ = 85812104960. Its totient is φ = 76502293560.

The previous prime is 81136960301. The next prime is 81136960357. The reversal of 81136960327 is 72306963118.

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 81136960327 - 2⁷ = 81136960199 is a prime.

It is a super-2 number, since 2×81136960327² (a number of 23 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 (81136960357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10115343 + ... + 10123360.

It is an arithmetic number, because the mean of its divisors is an integer number (10726513120).

Almost surely, 2^81136960327 is an apocalyptic number.

81136960327 is a deficient number, since it is larger than the sum of its proper divisors (4675144633).

81136960327 is a wasteful number, since it uses less digits than its factorization.

81136960327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20238933.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 81136960327 in words is "eighty-one billion, one hundred thirty-six million, nine hundred sixty thousand, three hundred twenty-seven".