5165841561 has 32 divisors (see below), whose sum is σ = 7655897088. Its totient is φ = 3081703680.

The previous prime is 5165841559. The next prime is 5165841587. The reversal of 5165841561 is 1651485615.

It is a happy number.

It is not a de Polignac number, because 5165841561 - 2¹ = 5165841559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5165141561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182706 + ... + 209076.

It is an arithmetic number, because the mean of its divisors is an integer number (239246784).

Almost surely, 2^5165841561 is an apocalyptic number.

5165841561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5165841561 is a deficient number, since it is larger than the sum of its proper divisors (2490055527).

5165841561 is a wasteful number, since it uses less digits than its factorization.

5165841561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26581.

The product of its digits is 144000, while the sum is 42.

The square root of 5165841561 is about 71873.7891098000. The cubic root of 5165841561 is about 1728.6763641036.

The spelling of 5165841561 in words is "five billion, one hundred sixty-five million, eight hundred forty-one thousand, five hundred sixty-one".