1982868439869 has 24 divisors (see below), whose sum is σ = 2994054855680. Its totient is φ = 1296970502256.

The previous prime is 1982868439861. The next prime is 1982868439873. The reversal of 1982868439869 is 9689348682891.

1982868439869 is a `hidden beast` number, since 1 + 98 + 2 + 8 + 6 + 84 + 398 + 69 = 666.

It is not a de Polignac number, because 1982868439869 - 2³ = 1982868439861 is a prime.

It is a super-2 number, since 2×1982868439869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982868439861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12996349 + ... + 13148034.

Almost surely, 2^{1982868439869} is an apocalyptic number.

It is an amenable number.

1982868439869 is a deficient number, since it is larger than the sum of its proper divisors (1011186415811).

1982868439869 is an equidigital number, since it uses as much as digits as its factorization.

1982868439869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26144498 (or 26144439 counting only the distinct ones).

The product of its digits is 2579890176, while the sum is 81.

The spelling of 1982868439869 in words is "one trillion, nine hundred eighty-two billion, eight hundred sixty-eight million, four hundred thirty-nine thousand, eight hundred sixty-nine".