6490899818 has 8 divisors (see below), whose sum is σ = 10485299748. Its totient is φ = 2995799904.

The previous prime is 6490899817. The next prime is 6490899841. The reversal of 6490899818 is 8189980946.

It can be written as a sum of positive squares in 2 ways, for example, as 4502007409 + 1988892409 = 67097^2 + 44597^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6490899817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124824971 + ... + 124825022.

Almost surely, 2^6490899818 is an apocalyptic number.

6490899818 is a deficient number, since it is larger than the sum of its proper divisors (3994399930).

6490899818 is a wasteful number, since it uses less digits than its factorization.

6490899818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249650008.

The product of its (nonzero) digits is 8957952, while the sum is 62.

The square root of 6490899818 is about 80566.1207828700. The cubic root of 6490899818 is about 1865.3842349586.

The spelling of 6490899818 in words is "six billion, four hundred ninety million, eight hundred ninety-nine thousand, eight hundred eighteen".