1985827802111 has 4 divisors (see below), whose sum is σ = 1985924040000. Its totient is φ = 1985731564224.

The previous prime is 1985827802099. The next prime is 1985827802143. The reversal of 1985827802111 is 1112087285891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1985827802111 - 2²⁶ = 1985760693247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985827802171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48087986 + ... + 48129263.

It is an arithmetic number, because the mean of its divisors is an integer number (496481010000).

Almost surely, 2^{1985827802111} is an apocalyptic number.

1985827802111 is a deficient number, since it is larger than the sum of its proper divisors (96237889).

1985827802111 is an equidigital number, since it uses as much as digits as its factorization.

1985827802111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96237888.

The product of its (nonzero) digits is 645120, while the sum is 53.

The spelling of 1985827802111 in words is "one trillion, nine hundred eighty-five billion, eight hundred twenty-seven million, eight hundred two thousand, one hundred eleven".