16311565616243 has 16 divisors (see below), whose sum is σ = 17300931328800. Its totient is φ = 15325526194176.

The previous prime is 16311565616221. The next prime is 16311565616327. The reversal of 16311565616243 is 34261656511361.

It is a happy number.

16311565616243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16311565616243 - 2³² = 16307270648947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16311565616191 and 16311565616200.

It is not an unprimeable number, because it can be changed into a prime (16311565619243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64333583 + ... + 64586631.

It is an arithmetic number, because the mean of its divisors is an integer number (1081308208050).

Almost surely, 2^{16311565616243} is an apocalyptic number.

16311565616243 is a deficient number, since it is larger than the sum of its proper divisors (989365712557).

16311565616243 is a wasteful number, since it uses less digits than its factorization.

16311565616243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259606.

The product of its digits is 2332800, while the sum is 50.

The spelling of 16311565616243 in words is "sixteen trillion, three hundred eleven billion, five hundred sixty-five million, six hundred sixteen thousand, two hundred forty-three".