1206106571609 has 2 divisors, whose sum is σ = 1206106571610. Its totient is φ = 1206106571608.

The previous prime is 1206106571479. The next prime is 1206106571641. The reversal of 1206106571609 is 9061756016021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1145334461209 + 60772110400 = 1070203^2 + 246520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206106571609 - 2³² = 1201811604313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1206106571609.

It is not a weakly prime, because it can be changed into another prime (1206106570609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603053285804 + 603053285805.

It is an arithmetic number, because the mean of its divisors is an integer number (603053285805).

Almost surely, 2^{1206106571609} is an apocalyptic number.

It is an amenable number.

1206106571609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206106571609 is an equidigital number, since it uses as much as digits as its factorization.

1206106571609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 1206106571609 in words is "one trillion, two hundred six billion, one hundred six million, five hundred seventy-one thousand, six hundred nine".