800129742169 has 4 divisors (see below), whose sum is σ = 800322409396. Its totient is φ = 799937074944.

The previous prime is 800129742163. The next prime is 800129742193. The reversal of 800129742169 is 961247921008.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149082476544 + 651047265625 = 386112^2 + 806875^2 .

It is a cyclic number.

It is not a de Polignac number, because 800129742169 - 2¹⁷ = 800129611097 is a prime.

It is a super-2 number, since 2×800129742169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800129742163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96327384 + ... + 96335689.

It is an arithmetic number, because the mean of its divisors is an integer number (200080602349).

Almost surely, 2^800129742169 is an apocalyptic number.

It is an amenable number.

800129742169 is a deficient number, since it is larger than the sum of its proper divisors (192667227).

800129742169 is a wasteful number, since it uses less digits than its factorization.

800129742169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192667226.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 800129742169 in words is "eight hundred billion, one hundred twenty-nine million, seven hundred forty-two thousand, one hundred sixty-nine".