1056705532661 has 2 divisors, whose sum is σ = 1056705532662. Its totient is φ = 1056705532660.

The previous prime is 1056705532627. The next prime is 1056705532733. The reversal of 1056705532661 is 1662355076501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 569543411761 + 487162120900 = 754681^2 + 697970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056705532661 - 2³⁸ = 781827625717 is a prime.

It is a super-2 number, since 2×1056705532661² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056705532361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528352766330 + 528352766331.

It is an arithmetic number, because the mean of its divisors is an integer number (528352766331).

Almost surely, 2^{1056705532661} is an apocalyptic number.

It is an amenable number.

1056705532661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056705532661 is an equidigital number, since it uses as much as digits as its factorization.

1056705532661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 47.

The spelling of 1056705532661 in words is "one trillion, fifty-six billion, seven hundred five million, five hundred thirty-two thousand, six hundred sixty-one".