1043156645689 has 2 divisors, whose sum is σ = 1043156645690. Its totient is φ = 1043156645688.

The previous prime is 1043156645683. The next prime is 1043156645701. The reversal of 1043156645689 is 9865466513401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012221112464 + 30935533225 = 1006092^2 + 175885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043156645689 - 2⁹ = 1043156645177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1043156645683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521578322844 + 521578322845.

It is an arithmetic number, because the mean of its divisors is an integer number (521578322845).

Almost surely, 2^{1043156645689} is an apocalyptic number.

It is an amenable number.

1043156645689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043156645689 is an equidigital number, since it uses as much as digits as its factorization.

1043156645689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 1043156645689 in words is "one trillion, forty-three billion, one hundred fifty-six million, six hundred forty-five thousand, six hundred eighty-nine".