16355520673 has 4 divisors (see below), whose sum is σ = 16500259908. Its totient is φ = 16210781440.

The previous prime is 16355520661. The next prime is 16355520703. The reversal of 16355520673 is 37602555361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3988301409 + 12367219264 = 63153^2 + 111208^2 .

It is a cyclic number.

It is not a de Polignac number, because 16355520673 - 2⁹ = 16355520161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16355520613) 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 3 ways as a sum of consecutive naturals, for example, 72369448 + ... + 72369673.

It is an arithmetic number, because the mean of its divisors is an integer number (4125064977).

Almost surely, 2^16355520673 is an apocalyptic number.

It is an amenable number.

16355520673 is a deficient number, since it is larger than the sum of its proper divisors (144739235).

16355520673 is a wasteful number, since it uses less digits than its factorization.

16355520673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144739234.

The product of its (nonzero) digits is 567000, while the sum is 43.

The spelling of 16355520673 in words is "sixteen billion, three hundred fifty-five million, five hundred twenty thousand, six hundred seventy-three".