6499782890 has 32 divisors (see below), whose sum is σ = 12689977104. Its totient is φ = 2387292160.

The previous prime is 6499782869. The next prime is 6499782901. The reversal of 6499782890 is 982879946.

It can be written as a sum of positive squares in 8 ways, for example, as 306565081 + 6193217809 = 17509^2 + 78697^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459299 + ... + 473238.

Almost surely, 2^6499782890 is an apocalyptic number.

6499782890 is a deficient number, since it is larger than the sum of its proper divisors (6190194214).

6499782890 is a wasteful number, since it uses less digits than its factorization.

6499782890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932602.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The square root of 6499782890 is about 80621.2310126805. The cubic root of 6499782890 is about 1866.2347995748.

The spelling of 6499782890 in words is "six billion, four hundred ninety-nine million, seven hundred eighty-two thousand, eight hundred ninety".