1061611151609 has 2 divisors, whose sum is σ = 1061611151610. Its totient is φ = 1061611151608.

The previous prime is 1061611151563. The next prime is 1061611151659. The reversal of 1061611151609 is 9061511161601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 927892945984 + 133718205625 = 963272^2 + 365675^2 .

It is an emirp because it is prime and its reverse (9061511161601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061611151609 is a prime.

It is a super-2 number, since 2×1061611151609² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1061611151659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530805575804 + 530805575805.

It is an arithmetic number, because the mean of its divisors is an integer number (530805575805).

Almost surely, 2^{1061611151609} is an apocalyptic number.

It is an amenable number.

1061611151609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061611151609 is an equidigital number, since it uses as much as digits as its factorization.

1061611151609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 38.

The spelling of 1061611151609 in words is "one trillion, sixty-one billion, six hundred eleven million, one hundred fifty-one thousand, six hundred nine".