1643676260143 has 2 divisors, whose sum is σ = 1643676260144. Its totient is φ = 1643676260142.

The previous prime is 1643676260123. The next prime is 1643676260173. The reversal of 1643676260143 is 3410626763461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1643676260143 - 2²⁵ = 1643642705711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1643676260123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821838130071 + 821838130072.

It is an arithmetic number, because the mean of its divisors is an integer number (821838130072).

Almost surely, 2^{1643676260143} is an apocalyptic number.

1643676260143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643676260143 is an equidigital number, since it uses as much as digits as its factorization.

1643676260143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 1643676260143 in words is "one trillion, six hundred forty-three billion, six hundred seventy-six million, two hundred sixty thousand, one hundred forty-three".