1649981324 has 48 divisors (see below), whose sum is σ = 3030128640. Its totient is φ = 785220480.

The previous prime is 1649981323. The next prime is 1649981363. The reversal of 1649981324 is 4231899461.

It is not an unprimeable number, because it can be changed into a prime (1649981321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3387809 + ... + 3388295.

It is an arithmetic number, because the mean of its divisors is an integer number (63127680).

Almost surely, 2^1649981324 is an apocalyptic number.

It is an amenable number.

1649981324 is a deficient number, since it is larger than the sum of its proper divisors (1380147316).

1649981324 is a wasteful number, since it uses less digits than its factorization.

1649981324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1649981324 is about 40619.9621368607. The cubic root of 1649981324 is about 1181.6612921094.

The spelling of 1649981324 in words is "one billion, six hundred forty-nine million, nine hundred eighty-one thousand, three hundred twenty-four".