36191770661 has 2 divisors, whose sum is σ = 36191770662. Its totient is φ = 36191770660.

The previous prime is 36191770609. The next prime is 36191770669. The reversal of 36191770661 is 16607719163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36185550625 + 6220036 = 190225^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 36191770661 - 2⁶ = 36191770597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36191770669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18095885330 + 18095885331.

It is an arithmetic number, because the mean of its divisors is an integer number (18095885331).

Almost surely, 2^36191770661 is an apocalyptic number.

It is an amenable number.

36191770661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36191770661 is an equidigital number, since it uses as much as digits as its factorization.

36191770661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 36191770661 in words is "thirty-six billion, one hundred ninety-one million, seven hundred seventy thousand, six hundred sixty-one".