1985849055 has 40 divisors (see below), whose sum is σ = 3610008864. Its totient is φ = 1044187200.

The previous prime is 1985849051. The next prime is 1985849071. The reversal of 1985849055 is 5509485891.

1985849055 is a `hidden beast` number, since 1 + 9 + 8 + 584 + 9 + 0 + 55 = 666.

It is not a de Polignac number, because 1985849055 - 2² = 1985849051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1985848992 and 1985849010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985849051) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5776 + ... + 63285.

Almost surely, 2^1985849055 is an apocalyptic number.

1985849055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1985849055 is a deficient number, since it is larger than the sum of its proper divisors (1624159809).

1985849055 is an equidigital number, since it uses as much as digits as its factorization.

1985849055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69149 (or 69140 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The square root of 1985849055 is about 44562.8663238800. The cubic root of 1985849055 is about 1256.9425016847.

The spelling of 1985849055 in words is "one billion, nine hundred eighty-five million, eight hundred forty-nine thousand, fifty-five".