5161601081 has 16 divisors (see below), whose sum is σ = 6726432384. Its totient is φ = 3843673344.

The previous prime is 5161601063. The next prime is 5161601087. The reversal of 5161601081 is 1801061615.

It is not a de Polignac number, because 5161601081 - 2³⁰ = 4087859257 is a prime.

It is a super-2 number, since 2×5161601081² = 53284251438760737122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5161601087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666715 + ... + 1669808.

It is an arithmetic number, because the mean of its divisors is an integer number (420402024).

Almost surely, 2^5161601081 is an apocalyptic number.

It is an amenable number.

5161601081 is a deficient number, since it is larger than the sum of its proper divisors (1564831303).

5161601081 is a wasteful number, since it uses less digits than its factorization.

5161601081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336560.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 5161601081 is about 71844.2835652218. The cubic root of 5161601081 is about 1728.2032289168.

Adding to 5161601081 its reverse (1801061615), we get a palindrome (6962662696).

The spelling of 5161601081 in words is "five billion, one hundred sixty-one million, six hundred one thousand, eighty-one".