180198000061 has 2 divisors, whose sum is σ = 180198000062. Its totient is φ = 180198000060.

The previous prime is 180198000007. The next prime is 180198000107. The reversal of 180198000061 is 160000891081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164247825625 + 15950174436 = 405275^2 + 126294^2 .

It is an emirp because it is prime and its reverse (160000891081) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 190000861081 and 180168000091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180198000061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180197999990 and 180198000026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180198000361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90099000030 + 90099000031.

It is an arithmetic number, because the mean of its divisors is an integer number (90099000031).

Almost surely, 2^180198000061 is an apocalyptic number.

It is an amenable number.

180198000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

180198000061 is an equidigital number, since it uses as much as digits as its factorization.

180198000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 180198000061 in words is "one hundred eighty billion, one hundred ninety-eight million, sixty-one", and thus it is an aban number.