8001420161 has 12 divisors (see below), whose sum is σ = 9312062868. Its totient is φ = 6855200352.

The previous prime is 8001420157. The next prime is 8001420179. The reversal of 8001420161 is 1610241008.

It can be written as a sum of positive squares in 2 ways, for example, as 4523369536 + 3478050625 = 67256^2 + 58975^2 .

It is not a de Polignac number, because 8001420161 - 2² = 8001420157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8001420151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73115 + ... + 146111.

It is an arithmetic number, because the mean of its divisors is an integer number (776005239).

Almost surely, 2^8001420161 is an apocalyptic number.

It is an amenable number.

8001420161 is a deficient number, since it is larger than the sum of its proper divisors (1310642707).

8001420161 is a wasteful number, since it uses less digits than its factorization.

8001420161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75248 (or 75241 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 8001420161 is about 89450.6576890299. The cubic root of 8001420161 is about 2000.1183397477.

Adding to 8001420161 its reverse (1610241008), we get a palindrome (9611661169).

The spelling of 8001420161 in words is "eight billion, one million, four hundred twenty thousand, one hundred sixty-one".