16555402732213 has 4 divisors (see below), whose sum is σ = 16556672623500. Its totient is φ = 16554132840928.

The previous prime is 16555402732117. The next prime is 16555402732223. The reversal of 16555402732213 is 31223720455561.

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 12780860951089 + 3774541781124 = 3575033^2 + 1942818^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555402732213 - 2²¹ = 16555400635061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16555402732223) 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, 634926088 + ... + 634952161.

It is an arithmetic number, because the mean of its divisors is an integer number (4139168155875).

Almost surely, 2^{16555402732213} is an apocalyptic number.

It is an amenable number.

16555402732213 is a deficient number, since it is larger than the sum of its proper divisors (1269891287).

16555402732213 is a wasteful number, since it uses less digits than its factorization.

16555402732213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269891286.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 16555402732213 in words is "sixteen trillion, five hundred fifty-five billion, four hundred two million, seven hundred thirty-two thousand, two hundred thirteen".