816361067809 has 8 divisors (see below), whose sum is σ = 939245716800. Its totient is φ = 695041828656.

The previous prime is 816361067803. The next prime is 816361067827. The reversal of 816361067809 is 908760163618.

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

It is not a de Polignac number, because 816361067809 - 2³⁹ = 266605253921 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 816361067809.

It is not an unprimeable number, because it can be changed into a prime (816361067803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391351339 + ... + 391353424.

It is an arithmetic number, because the mean of its divisors is an integer number (117405714600).

Almost surely, 2^816361067809 is an apocalyptic number.

It is an amenable number.

816361067809 is a deficient number, since it is larger than the sum of its proper divisors (122884648991).

816361067809 is a wasteful number, since it uses less digits than its factorization.

816361067809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782704919.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 816361067809 in words is "eight hundred sixteen billion, three hundred sixty-one million, sixty-seven thousand, eight hundred nine".