809629143869 has 32 divisors (see below), whose sum is σ = 1059286346496. Its totient is φ = 600501888000.

The previous prime is 809629143839. The next prime is 809629143871. The reversal of 809629143869 is 968341926908.

It is not a de Polignac number, because 809629143869 - 2¹² = 809629139773 is a prime.

It is a super-2 number, since 2×809629143869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809629143809) 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 31 ways as a sum of consecutive naturals, for example, 654242 + ... + 1430835.

It is an arithmetic number, because the mean of its divisors is an integer number (33102698328).

Almost surely, 2^809629143869 is an apocalyptic number.

It is an amenable number.

809629143869 is a deficient number, since it is larger than the sum of its proper divisors (249657202627).

809629143869 is a wasteful number, since it uses less digits than its factorization.

809629143869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085365.

The product of its (nonzero) digits is 40310784, while the sum is 65.

The spelling of 809629143869 in words is "eight hundred nine billion, six hundred twenty-nine million, one hundred forty-three thousand, eight hundred sixty-nine".