5165886861 has 10 divisors (see below), whose sum is σ = 7716942222. Its totient is φ = 3443924520.

The previous prime is 5165886857. The next prime is 5165886893. The reversal of 5165886861 is 1686885615.

5165886861 is a `hidden beast` number, since 51 + 6 + 588 + 6 + 8 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5140029636 + 25857225 = 71694^2 + 5085^2 .

It is not a de Polignac number, because 5165886861 - 2² = 5165886857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5165886798 and 5165886807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5165886961) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 31888110 + ... + 31888271.

Almost surely, 2^5165886861 is an apocalyptic number.

It is an amenable number.

5165886861 is a deficient number, since it is larger than the sum of its proper divisors (2551055361).

5165886861 is an equidigital number, since it uses as much as digits as its factorization.

5165886861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63776393 (or 63776384 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 5165886861 is about 71874.1042448530. The cubic root of 5165886861 is about 1728.6814170918.

The spelling of 5165886861 in words is "five billion, one hundred sixty-five million, eight hundred eighty-six thousand, eight hundred sixty-one".