7999832161 has 4 divisors (see below), whose sum is σ = 8000047300. Its totient is φ = 7999617024.

The previous prime is 7999832117. The next prime is 7999832173. The reversal of 7999832161 is 1612389997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1612389997 = 599 ⋅2691803.

It can be written as a sum of positive squares in 2 ways, for example, as 950550561 + 7049281600 = 30831^2 + 83960^2 .

It is a cyclic number.

It is not a de Polignac number, because 7999832161 - 2¹³ = 7999823969 is a prime.

It is a deceptive number, since it divides R_7999832160.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7999832761) 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, 35856 + ... + 131473.

It is an arithmetic number, because the mean of its divisors is an integer number (2000011825).

Almost surely, 2^7999832161 is an apocalyptic number.

7999832161 is the 47809-th nonagonal number.

It is an amenable number.

7999832161 is a deficient number, since it is larger than the sum of its proper divisors (215139).

7999832161 is a wasteful number, since it uses less digits than its factorization.

7999832161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215138.

The product of its digits is 1469664, while the sum is 55.

The square root of 7999832161 is about 89441.7808465373. The cubic root of 7999832161 is about 1999.9860133189.

The spelling of 7999832161 in words is "seven billion, nine hundred ninety-nine million, eight hundred thirty-two thousand, one hundred sixty-one".