9999464161 has 4 divisors (see below), whose sum is σ = 10344273300. Its totient is φ = 9654655024.

The previous prime is 9999464131. The next prime is 9999464171. The reversal of 9999464161 is 1614649999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1614649999 = 2011 ⋅802909.

It can be written as a sum of positive squares in 2 ways, for example, as 6281513536 + 3717950625 = 79256^2 + 60975^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999464161 - 2¹³ = 9999455969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9999464096 and 9999464105.

It is not an unprimeable number, because it can be changed into a prime (9999464131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172404526 + ... + 172404583.

It is an arithmetic number, because the mean of its divisors is an integer number (2586068325).

Almost surely, 2^9999464161 is an apocalyptic number.

It is an amenable number.

9999464161 is a deficient number, since it is larger than the sum of its proper divisors (344809139).

9999464161 is a wasteful number, since it uses less digits than its factorization.

9999464161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344809138.

The product of its digits is 3779136, while the sum is 58.

The square root of 9999464161 is about 99997.3207691086. The cubic root of 9999464161 is about 2154.3962083402.

The spelling of 9999464161 in words is "nine billion, nine hundred ninety-nine million, four hundred sixty-four thousand, one hundred sixty-one".