16908500191 has 12 divisors (see below), whose sum is σ = 18900390600. Its totient is φ = 15110825840.

The previous prime is 16908500171. The next prime is 16908500239. The reversal of 16908500191 is 19100580961.

It is not a de Polignac number, because 16908500191 - 2¹¹ = 16908498143 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 (16908500171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1177096 + ... + 1191373.

It is an arithmetic number, because the mean of its divisors is an integer number (1575032550).

Almost surely, 2^16908500191 is an apocalyptic number.

16908500191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16908500191 is a deficient number, since it is larger than the sum of its proper divisors (1991890409).

16908500191 is a wasteful number, since it uses less digits than its factorization.

16908500191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368550 (or 2368539 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 16908500191 in words is "sixteen billion, nine hundred eight million, five hundred thousand, one hundred ninety-one".