191018084635361 has 2 divisors, whose sum is σ = 191018084635362. Its totient is φ = 191018084635360.

The previous prime is 191018084635349. The next prime is 191018084635421. The reversal of 191018084635361 is 163536480810191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120177919079761 + 70840165555600 = 10962569^2 + 8416660^2 .

It is a cyclic number.

It is not a de Polignac number, because 191018084635361 - 2⁴⁶ = 120649340457697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191018084635297 and 191018084635306.

It is not a weakly prime, because it can be changed into another prime (191018084635331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95509042317680 + 95509042317681.

It is an arithmetic number, because the mean of its divisors is an integer number (95509042317681).

Almost surely, 2^{191018084635361} is an apocalyptic number.

It is an amenable number.

191018084635361 is a deficient number, since it is larger than the sum of its proper divisors (1).

191018084635361 is an equidigital number, since it uses as much as digits as its factorization.

191018084635361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 191018084635361 in words is "one hundred ninety-one trillion, eighteen billion, eighty-four million, six hundred thirty-five thousand, three hundred sixty-one".