16717945840 has 20 divisors (see below), whose sum is σ = 38869224264. Its totient is φ = 6687178304.

The previous prime is 16717945837. The next prime is 16717945859. The reversal of 16717945840 is 4854971761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104487082 + ... + 104487241.

Almost surely, 2^16717945840 is an apocalyptic number.

16717945840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16717945840 is an abundant number, since it is smaller than the sum of its proper divisors (22151278424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16717945840 is a wasteful number, since it uses less digits than its factorization.

16717945840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208974336 (or 208974330 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 16717945840 in words is "sixteen billion, seven hundred seventeen million, nine hundred forty-five thousand, eight hundred forty".