181292100238061 has 2 divisors, whose sum is σ = 181292100238062. Its totient is φ = 181292100238060.

The previous prime is 181292100238049. The next prime is 181292100238127. The reversal of 181292100238061 is 160832001292181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146858793597961 + 34433306640100 = 12118531^2 + 5867990^2 .

It is an emirp because it is prime and its reverse (160832001292181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181292100238061 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181292100238261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90646050119030 + 90646050119031.

It is an arithmetic number, because the mean of its divisors is an integer number (90646050119031).

Almost surely, 2^{181292100238061} is an apocalyptic number.

It is an amenable number.

181292100238061 is a deficient number, since it is larger than the sum of its proper divisors (1).

181292100238061 is an equidigital number, since it uses as much as digits as its factorization.

181292100238061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 181292100238061 in words is "one hundred eighty-one trillion, two hundred ninety-two billion, one hundred million, two hundred thirty-eight thousand, sixty-one".