16606289491 has 32 divisors (see below), whose sum is σ = 18862212096. Its totient is φ = 14488416000.

The previous prime is 16606289437. The next prime is 16606289519. The reversal of 16606289491 is 19498260661.

It is a happy number.

It is not a de Polignac number, because 16606289491 - 2¹⁹ = 16605765203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16606289291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10143525 + ... + 10145161.

It is an arithmetic number, because the mean of its divisors is an integer number (589444128).

Almost surely, 2^16606289491 is an apocalyptic number.

16606289491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16606289491 is a deficient number, since it is larger than the sum of its proper divisors (2255922605).

16606289491 is a wasteful number, since it uses less digits than its factorization.

16606289491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 16606289491 in words is "sixteen billion, six hundred six million, two hundred eighty-nine thousand, four hundred ninety-one".