1606185749 has 12 divisors (see below), whose sum is σ = 1949657184. Its totient is φ = 1316871864.

The previous prime is 1606185743. The next prime is 1606185773. The reversal of 1606185749 is 9475816061.

It is not a de Polignac number, because 1606185749 - 2¹² = 1606181653 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606185743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 711467 + ... + 713720.

It is an arithmetic number, because the mean of its divisors is an integer number (162471432).

Almost surely, 2^1606185749 is an apocalyptic number.

It is an amenable number.

1606185749 is a deficient number, since it is larger than the sum of its proper divisors (343471435).

1606185749 is a wasteful number, since it uses less digits than its factorization.

1606185749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425224 (or 1425217 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1606185749 is about 40077.2472732347. The cubic root of 1606185749 is about 1171.1124270144.

The spelling of 1606185749 in words is "one billion, six hundred six million, one hundred eighty-five thousand, seven hundred forty-nine".