1649608149 has 12 divisors (see below), whose sum is σ = 2513972256. Its totient is φ = 942526872.

The previous prime is 1649608099. The next prime is 1649608153. The reversal of 1649608149 is 9418069461.

It is not a de Polignac number, because 1649608149 - 2¹³ = 1649599957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649608098 and 1649608107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649608159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181692 + ... + 190554.

It is an arithmetic number, because the mean of its divisors is an integer number (209497688).

Almost surely, 2^1649608149 is an apocalyptic number.

It is an amenable number.

1649608149 is a deficient number, since it is larger than the sum of its proper divisors (864364107).

1649608149 is an frugal number, since it uses more digits than its factorization.

1649608149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736 (or 8873 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1649608149 is about 40615.3683843936. The cubic root of 1649608149 is about 1181.5722002522.

The spelling of 1649608149 in words is "one billion, six hundred forty-nine million, six hundred eight thousand, one hundred forty-nine".