17657990668 has 6 divisors (see below), whose sum is σ = 30901483676. Its totient is φ = 8828995332.

The previous prime is 17657990639. The next prime is 17657990681. The reversal of 17657990668 is 86609975671.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2207248830 + ... + 2207248837.

Almost surely, 2^17657990668 is an apocalyptic number.

It is an amenable number.

17657990668 is a deficient number, since it is larger than the sum of its proper divisors (13243493008).

17657990668 is a wasteful number, since it uses less digits than its factorization.

17657990668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414497671 (or 4414497669 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 17657990668 in words is "seventeen billion, six hundred fifty-seven million, nine hundred ninety thousand, six hundred sixty-eight".