1649010638 has 32 divisors (see below), whose sum is σ = 2745495648. Its totient is φ = 736576000.

The previous prime is 1649010637. The next prime is 1649010707. The reversal of 1649010638 is 8360109461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649010631) 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 15 ways as a sum of consecutive naturals, for example, 301706 + ... + 307122.

It is an arithmetic number, because the mean of its divisors is an integer number (85796739).

Almost surely, 2^1649010638 is an apocalyptic number.

1649010638 is a deficient number, since it is larger than the sum of its proper divisors (1096485010).

1649010638 is a wasteful number, since it uses less digits than its factorization.

1649010638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5668.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1649010638 is about 40608.0119927090. The cubic root of 1649010638 is about 1181.4295223995.

The spelling of 1649010638 in words is "one billion, six hundred forty-nine million, ten thousand, six hundred thirty-eight".