16649317371 has 8 divisors (see below), whose sum is σ = 22199686144. Its totient is φ = 11099246760.

The previous prime is 16649317367. The next prime is 16649317409. The reversal of 16649317371 is 17371394661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16649317371 - 2² = 16649317367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16649317371.

It is not an unprimeable number, because it can be changed into a prime (16649317471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177570 + ... + 254616.

It is an arithmetic number, because the mean of its divisors is an integer number (2774960768).

Almost surely, 2^16649317371 is an apocalyptic number.

16649317371 is a deficient number, since it is larger than the sum of its proper divisors (5550368773).

16649317371 is an equidigital number, since it uses as much as digits as its factorization.

16649317371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149081.

The product of its digits is 571536, while the sum is 48.

The spelling of 16649317371 in words is "sixteen billion, six hundred forty-nine million, three hundred seventeen thousand, three hundred seventy-one".