1649865674 has 8 divisors (see below), whose sum is σ = 2620374948. Its totient is φ = 776407360.

The previous prime is 1649865671. The next prime is 1649865697. The reversal of 1649865674 is 4765689461.

It can be written as a sum of positive squares in 2 ways, for example, as 1634989225 + 14876449 = 40435^2 + 3857^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1649865671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24262697 + ... + 24262764.

Almost surely, 2^1649865674 is an apocalyptic number.

1649865674 is a deficient number, since it is larger than the sum of its proper divisors (970509274).

1649865674 is a wasteful number, since it uses less digits than its factorization.

1649865674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48525480.

The product of its digits is 8709120, while the sum is 56.

The square root of 1649865674 is about 40618.5385507652. The cubic root of 1649865674 is about 1181.6336832471.

The spelling of 1649865674 in words is "one billion, six hundred forty-nine million, eight hundred sixty-five thousand, six hundred seventy-four".