805399316129 has 16 divisors (see below), whose sum is σ = 849060240000. Its totient is φ = 761866093440.

The previous prime is 805399316089. The next prime is 805399316237. The reversal of 805399316129 is 921613993508.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 805399316129 - 2³² = 801104348833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805399316329) 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, 96694037 + ... + 96702365.

It is an arithmetic number, because the mean of its divisors is an integer number (53066265000).

Almost surely, 2^805399316129 is an apocalyptic number.

It is an amenable number.

805399316129 is a deficient number, since it is larger than the sum of its proper divisors (43660923871).

805399316129 is a wasteful number, since it uses less digits than its factorization.

805399316129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15368.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 805399316129 in words is "eight hundred five billion, three hundred ninety-nine million, three hundred sixteen thousand, one hundred twenty-nine".