16444637226 has 16 divisors (see below), whose sum is σ = 36543638400. Its totient is φ = 5481545724.

The previous prime is 16444637203. The next prime is 16444637227. The reversal of 16444637226 is 62273644461.

16444637226 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 4 + 637 + 2 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (16444637227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152265106 + ... + 152265213.

It is an arithmetic number, because the mean of its divisors is an integer number (2283977400).

Almost surely, 2^16444637226 is an apocalyptic number.

16444637226 is an abundant number, since it is smaller than the sum of its proper divisors (20099001174).

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

16444637226 is a wasteful number, since it uses less digits than its factorization.

16444637226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304530330 (or 304530324 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The spelling of 16444637226 in words is "sixteen billion, four hundred forty-four million, six hundred thirty-seven thousand, two hundred twenty-six".