16644223876357 has 24 divisors (see below), whose sum is σ = 21122239624992. Its totient is φ = 12969253936800.

The previous prime is 16644223876339. The next prime is 16644223876361. The reversal of 16644223876357 is 75367832244661.

It is not a de Polignac number, because 16644223876357 - 2⁷ = 16644223876229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644223876057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27742518 + ... + 28336120.

It is an arithmetic number, because the mean of its divisors is an integer number (880093317708).

Almost surely, 2^{16644223876357} is an apocalyptic number.

It is an amenable number.

16644223876357 is a deficient number, since it is larger than the sum of its proper divisors (4478015748635).

16644223876357 is a wasteful number, since it uses less digits than its factorization.

16644223876357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645649 (or 645642 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 64.

The spelling of 16644223876357 in words is "sixteen trillion, six hundred forty-four billion, two hundred twenty-three million, eight hundred seventy-six thousand, three hundred fifty-seven".