16545201666442 has 8 divisors (see below), whose sum is σ = 24817935621600. Its totient is φ = 8272556459244.

The previous prime is 16545201666431. The next prime is 16545201666449. The reversal of 16545201666442 is 24466610254561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16545201666442.

It is not an unprimeable number, because it can be changed into a prime (16545201666449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21718942 + ... + 22467817.

It is an arithmetic number, because the mean of its divisors is an integer number (3102241952700).

Almost surely, 2^{16545201666442} is an apocalyptic number.

16545201666442 is a deficient number, since it is larger than the sum of its proper divisors (8272733955158).

16545201666442 is a wasteful number, since it uses less digits than its factorization.

16545201666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44373980.

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 16545201666442 in words is "sixteen trillion, five hundred forty-five billion, two hundred one million, six hundred sixty-six thousand, four hundred forty-two".