1985608396741 has 2 divisors, whose sum is σ = 1985608396742. Its totient is φ = 1985608396740.

The previous prime is 1985608396643. The next prime is 1985608396747. The reversal of 1985608396741 is 1476938065891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1665106352100 + 320502044641 = 1290390^2 + 566129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985608396741 - 2⁹ = 1985608396229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1985608396747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992804198370 + 992804198371.

It is an arithmetic number, because the mean of its divisors is an integer number (992804198371).

Almost surely, 2^{1985608396741} is an apocalyptic number.

It is an amenable number.

1985608396741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985608396741 is an equidigital number, since it uses as much as digits as its factorization.

1985608396741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 67.

The spelling of 1985608396741 in words is "one trillion, nine hundred eighty-five billion, six hundred eight million, three hundred ninety-six thousand, seven hundred forty-one".