1649609498 has 16 divisors (see below), whose sum is σ = 2544661224. Its totient is φ = 801546240.

The previous prime is 1649609491. The next prime is 1649609503. The reversal of 1649609498 is 8949069461.

It can be written as a sum of positive squares in 4 ways, for example, as 999002449 + 650607049 = 31607^2 + 25507^2 .

It is a super-2 number, since 2×1649609498² = 5442422991783624008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1649609491) 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, 18065 + ... + 60212.

Almost surely, 2^1649609498 is an apocalyptic number.

1649609498 is a deficient number, since it is larger than the sum of its proper divisors (895051726).

1649609498 is a wasteful number, since it uses less digits than its factorization.

1649609498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78577.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 1649609498 is about 40615.3849914044. The cubic root of 1649609498 is about 1181.5725223369.

The spelling of 1649609498 in words is "one billion, six hundred forty-nine million, six hundred nine thousand, four hundred ninety-eight".