181660010593 has 2 divisors, whose sum is σ = 181660010594. Its totient is φ = 181660010592.

The previous prime is 181660010579. The next prime is 181660010611. The reversal of 181660010593 is 395010066181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172035811984 + 9624198609 = 414772^2 + 98103^2 .

It is a cyclic number.

It is not a de Polignac number, because 181660010593 - 2²⁵ = 181626456161 is a prime.

It is not a weakly prime, because it can be changed into another prime (181660010533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90830005296 + 90830005297.

It is an arithmetic number, because the mean of its divisors is an integer number (90830005297).

Almost surely, 2^181660010593 is an apocalyptic number.

It is an amenable number.

181660010593 is a deficient number, since it is larger than the sum of its proper divisors (1).

181660010593 is an equidigital number, since it uses as much as digits as its factorization.

181660010593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 181660010593 in words is "one hundred eighty-one billion, six hundred sixty million, ten thousand, five hundred ninety-three".