19446350649 has 16 divisors (see below), whose sum is σ = 28311674880. Its totient is φ = 11774802960.

The previous prime is 19446350611. The next prime is 19446350653. The reversal of 19446350649 is 94605364491.

It is not a de Polignac number, because 19446350649 - 2⁸ = 19446350393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19446357649) 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, 235189 + ... + 306930.

It is an arithmetic number, because the mean of its divisors is an integer number (1769479680).

Almost surely, 2^19446350649 is an apocalyptic number.

It is an amenable number.

19446350649 is a deficient number, since it is larger than the sum of its proper divisors (8865324231).

19446350649 is a wasteful number, since it uses less digits than its factorization.

19446350649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543220.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 19446350649 in words is "nineteen billion, four hundred forty-six million, three hundred fifty thousand, six hundred forty-nine".