81566190606234 has 8 divisors (see below), whose sum is σ = 163132381212480. Its totient is φ = 27188730202076.

The previous prime is 81566190606233. The next prime is 81566190606301. The reversal of 81566190606234 is 43260609166518.

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

81566190606234 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81566190606233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6797182550514 + ... + 6797182550525.

It is an arithmetic number, because the mean of its divisors is an integer number (20391547651560).

Almost surely, 2^{81566190606234} is an apocalyptic number.

81566190606234 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.

81566190606234 is a wasteful number, since it uses less digits than its factorization.

81566190606234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13594365101044.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 81566190606234 in words is "eighty-one trillion, five hundred sixty-six billion, one hundred ninety million, six hundred six thousand, two hundred thirty-four".