1985641847443 has 2 divisors, whose sum is σ = 1985641847444. Its totient is φ = 1985641847442.

The previous prime is 1985641847429. The next prime is 1985641847461. The reversal of 1985641847443 is 3447481465891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1985641847443 - 2²¹ = 1985639750291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1985441847443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992820923721 + 992820923722.

It is an arithmetic number, because the mean of its divisors is an integer number (992820923722).

Almost surely, 2^{1985641847443} is an apocalyptic number.

1985641847443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985641847443 is an equidigital number, since it uses as much as digits as its factorization.

1985641847443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92897280, while the sum is 64.

The spelling of 1985641847443 in words is "one trillion, nine hundred eighty-five billion, six hundred forty-one million, eight hundred forty-seven thousand, four hundred forty-three".