16442663474545 has 48 divisors (see below), whose sum is σ = 25039885669056. Its totient is φ = 10249698480000.

The previous prime is 16442663474543. The next prime is 16442663474561. The reversal of 16442663474545 is 54547436624461.

It is a happy number.

It is not a de Polignac number, because 16442663474545 - 2¹ = 16442663474543 is a prime.

It is a super-3 number, since 3×16442663474545³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442663474543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157473255 + ... + 157577635.

It is an arithmetic number, because the mean of its divisors is an integer number (521664284772).

Almost surely, 2^{16442663474545} is an apocalyptic number.

It is an amenable number.

16442663474545 is a deficient number, since it is larger than the sum of its proper divisors (8597222194511).

16442663474545 is a wasteful number, since it uses less digits than its factorization.

16442663474545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162862 (or 162855 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 61.

The spelling of 16442663474545 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-three million, four hundred seventy-four thousand, five hundred forty-five".