16645274226 has 192 divisors, whose sum is σ = 45711993600. Its totient is φ = 4461101568.

The previous prime is 16645274171. The next prime is 16645274231. The reversal of 16645274226 is 62247254661.

16645274226 is a `hidden beast` number, since 1 + 6 + 64 + 527 + 42 + 26 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22895475 + ... + 22896201.

It is an arithmetic number, because the mean of its divisors is an integer number (238083300).

Almost surely, 2^16645274226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16645274226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22855996800).

16645274226 is an abundant number, since it is smaller than the sum of its proper divisors (29066719374).

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

16645274226 is a wasteful number, since it uses less digits than its factorization.

16645274226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1265 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 16645274226 in words is "sixteen billion, six hundred forty-five million, two hundred seventy-four thousand, two hundred twenty-six".