1943168686849 has 8 divisors (see below), whose sum is σ = 2101781384360. Its totient is φ = 1785861444096.

The previous prime is 1943168686843. The next prime is 1943168686883. The reversal of 1943168686849 is 9486868613491.

It can be written as a sum of positive squares in 4 ways, for example, as 199165838400 + 1744002848449 = 446280^2 + 1320607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1943168686849 - 2³¹ = 1941021203201 is a prime.

It is a super-3 number, since 3×1943168686849³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1943168686843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326360592 + ... + 326366545.

It is an arithmetic number, because the mean of its divisors is an integer number (262722673045).

Almost surely, 2^{1943168686849} is an apocalyptic number.

It is an amenable number.

1943168686849 is a deficient number, since it is larger than the sum of its proper divisors (158612697511).

1943168686849 is a wasteful number, since it uses less digits than its factorization.

1943168686849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652727379.

The product of its digits is 429981696, while the sum is 73.

The spelling of 1943168686849 in words is "one trillion, nine hundred forty-three billion, one hundred sixty-eight million, six hundred eighty-six thousand, eight hundred forty-nine".