16646303574561 has 16 divisors (see below), whose sum is σ = 22214402973504. Its totient is φ = 11087870559744.

The previous prime is 16646303574559. The next prime is 16646303574583. The reversal of 16646303574561 is 16547530364661.

It is not a de Polignac number, because 16646303574561 - 2¹ = 16646303574559 is a prime.

It is a super-3 number, since 3×16646303574561³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16646303574161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151361785 + ... + 151471721.

It is an arithmetic number, because the mean of its divisors is an integer number (1388400185844).

Almost surely, 2^{16646303574561} is an apocalyptic number.

It is an amenable number.

16646303574561 is a deficient number, since it is larger than the sum of its proper divisors (5568099398943).

16646303574561 is a wasteful number, since it uses less digits than its factorization.

16646303574561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153440.

The product of its (nonzero) digits is 32659200, while the sum is 57.

The spelling of 16646303574561 in words is "sixteen trillion, six hundred forty-six billion, three hundred three million, five hundred seventy-four thousand, five hundred sixty-one".