17948216663 has 4 divisors (see below), whose sum is σ = 19328848728. Its totient is φ = 16567584600.

The previous prime is 17948216653. The next prime is 17948216719. The reversal of 17948216663 is 36661284971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36661284971 = 8707 ⋅4210553.

It is a cyclic number.

It is not a de Polignac number, because 17948216663 - 2⁴ = 17948216647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17948216653) 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 3 ways as a sum of consecutive naturals, for example, 690316013 + ... + 690316038.

It is an arithmetic number, because the mean of its divisors is an integer number (4832212182).

Almost surely, 2^17948216663 is an apocalyptic number.

17948216663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

17948216663 is a deficient number, since it is larger than the sum of its proper divisors (1380632065).

17948216663 is a wasteful number, since it uses less digits than its factorization.

17948216663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380632064.

The product of its digits is 2612736, while the sum is 53.

The spelling of 17948216663 in words is "seventeen billion, nine hundred forty-eight million, two hundred sixteen thousand, six hundred sixty-three".