16720465535 has 4 divisors (see below), whose sum is σ = 20064558648. Its totient is φ = 13376372424.

The previous prime is 16720465513. The next prime is 16720465547. The reversal of 16720465535 is 53556402761.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16720465535 - 2²⁸ = 16452030079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672046549 + ... + 1672046558.

It is an arithmetic number, because the mean of its divisors is an integer number (5016139662).

Almost surely, 2^16720465535 is an apocalyptic number.

16720465535 is a deficient number, since it is larger than the sum of its proper divisors (3344093113).

16720465535 is an equidigital number, since it uses as much as digits as its factorization.

16720465535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344093112.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 16720465535 in words is "sixteen billion, seven hundred twenty million, four hundred sixty-five thousand, five hundred thirty-five".