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BaseRepresentation
bin10011001100111…
…10010111101011
3102020002202022222
421212132113223
5312214041221
623552304255
73664110233
oct1146362753
9366082288
10161080811
1182a20441
1245b4208b
13274ab6b8
1417570cc3
15e21c9ab
hex999e5eb

161080811 has 2 divisors, whose sum is σ = 161080812. Its totient is φ = 161080810.

The previous prime is 161080781. The next prime is 161080817. The reversal of 161080811 is 118080161.

It is a strong prime.

It is an emirp because it is prime and its reverse (118080161) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 118080191 and 191080811.

It is a cyclic number.

It is not a de Polignac number, because 161080811 - 26 = 161080747 is a prime.

It is a Chen prime.

It is equal to p9031805 and since 161080811 and 9031805 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161080817) 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 as a sum of consecutive naturals, namely, 80540405 + 80540406.

It is an arithmetic number, because the mean of its divisors is an integer number (80540406).

Almost surely, 2161080811 is an apocalyptic number.

161080811 is a deficient number, since it is larger than the sum of its proper divisors (1).

161080811 is an equidigital number, since it uses as much as digits as its factorization.

161080811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 161080811 is about 12691.7615404640. The cubic root of 161080811 is about 544.1031862997.

The spelling of 161080811 in words is "one hundred sixty-one million, eighty thousand, eight hundred eleven".