9429856247809 has 16 divisors (see below), whose sum is σ = 9995137326720. Its totient is φ = 8880679911040.

The previous prime is 9429856247737. The next prime is 9429856247879. The reversal of 9429856247809 is 9087426589249.

It is not a de Polignac number, because 9429856247809 - 2²¹ = 9429854150657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9429856247879) 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, 4583934 + ... + 6314440.

It is an arithmetic number, because the mean of its divisors is an integer number (624696082920).

Almost surely, 2^{9429856247809} is an apocalyptic number.

It is an amenable number.

9429856247809 is a deficient number, since it is larger than the sum of its proper divisors (565281078911).

9429856247809 is a wasteful number, since it uses less digits than its factorization.

9429856247809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735160.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 9429856247809 in words is "nine trillion, four hundred twenty-nine billion, eight hundred fifty-six million, two hundred forty-seven thousand, eight hundred nine".