16520553233 has 8 divisors (see below), whose sum is σ = 17713774080. Its totient is φ = 15351935040.

The previous prime is 16520553227. The next prime is 16520553307. The reversal of 16520553233 is 33235502561.

16520553233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16520553233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16520553193 and 16520553202.

It is not an unprimeable number, because it can be changed into a prime (16520553433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6149273 + ... + 6151958.

It is an arithmetic number, because the mean of its divisors is an integer number (2214221760).

Almost surely, 2^16520553233 is an apocalyptic number.

It is an amenable number.

16520553233 is a deficient number, since it is larger than the sum of its proper divisors (1193220847).

16520553233 is a wasteful number, since it uses less digits than its factorization.

16520553233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301327.

The product of its (nonzero) digits is 81000, while the sum is 35.

The spelling of 16520553233 in words is "sixteen billion, five hundred twenty million, five hundred fifty-three thousand, two hundred thirty-three".