1649162885 has 8 divisors (see below), whose sum is σ = 2027263896. Its totient is φ = 1287151360.

The previous prime is 1649162869. The next prime is 1649162887. The reversal of 1649162885 is 5882619461.

It can be written as a sum of positive squares in 4 ways, for example, as 2669956 + 1646492929 = 1634^2 + 40577^2 .

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

It is not a de Polignac number, because 1649162885 - 2⁴ = 1649162869 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 (1649162887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4022144 + ... + 4022553.

It is an arithmetic number, because the mean of its divisors is an integer number (253407987).

Almost surely, 2^1649162885 is an apocalyptic number.

It is an amenable number.

1649162885 is a deficient number, since it is larger than the sum of its proper divisors (378101011).

1649162885 is an equidigital number, since it uses as much as digits as its factorization.

1649162885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044743.

The product of its digits is 829440, while the sum is 50.

The square root of 1649162885 is about 40609.8865425650. The cubic root of 1649162885 is about 1181.4658802740.

The spelling of 1649162885 in words is "one billion, six hundred forty-nine million, one hundred sixty-two thousand, eight hundred eighty-five".