16317725243 has 4 divisors (see below), whose sum is σ = 16320960888. Its totient is φ = 16314489600.

The previous prime is 16317725233. The next prime is 16317725279. The reversal of 16317725243 is 34252771361.

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 16317725243 - 2³² = 12022757947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16317725243.

It is not an unprimeable number, because it can be changed into a prime (16317725233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610246 + ... + 1620347.

It is an arithmetic number, because the mean of its divisors is an integer number (4080240222).

Almost surely, 2^16317725243 is an apocalyptic number.

16317725243 is a deficient number, since it is larger than the sum of its proper divisors (3235645).

16317725243 is an equidigital number, since it uses as much as digits as its factorization.

16317725243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235644.

The product of its digits is 211680, while the sum is 41.

The spelling of 16317725243 in words is "sixteen billion, three hundred seventeen million, seven hundred twenty-five thousand, two hundred forty-three".