1067564013781 has 2 divisors, whose sum is σ = 1067564013782. Its totient is φ = 1067564013780.

The previous prime is 1067564013767. The next prime is 1067564013851. The reversal of 1067564013781 is 1873104657601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045352880625 + 22211133156 = 1022425^2 + 149034^2 .

It is a cyclic number.

It is not a de Polignac number, because 1067564013781 - 2³¹ = 1065416530133 is a prime.

It is a super-2 number, since 2×1067564013781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1067564013731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533782006890 + 533782006891.

It is an arithmetic number, because the mean of its divisors is an integer number (533782006891).

Almost surely, 2^{1067564013781} is an apocalyptic number.

It is an amenable number.

1067564013781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067564013781 is an equidigital number, since it uses as much as digits as its factorization.

1067564013781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 1067564013781 in words is "one trillion, sixty-seven billion, five hundred sixty-four million, thirteen thousand, seven hundred eighty-one".