1649451834 has 24 divisors (see below), whose sum is σ = 3632401812. Its totient is φ = 540803520.

The previous prime is 1649451799. The next prime is 1649451841. The reversal of 1649451834 is 4381549461.

1649451834 is a `hidden beast` number, since 16 + 4 + 94 + 518 + 34 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1532487609 + 116964225 = 39147^2 + 10815^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1649451834.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 750019 + ... + 752214.

Almost surely, 2^1649451834 is an apocalyptic number.

1649451834 is an abundant number, since it is smaller than the sum of its proper divisors (1982949978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1649451834 is a wasteful number, since it uses less digits than its factorization.

1649451834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502302 (or 1502299 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 1649451834 is about 40613.4440056492. Note that the first 3 decimals coincide. The cubic root of 1649451834 is about 1181.5348775921.

The spelling of 1649451834 in words is "one billion, six hundred forty-nine million, four hundred fifty-one thousand, eight hundred thirty-four".