5161661099 has 8 divisors (see below), whose sum is σ = 5910367968. Its totient is φ = 4415785920.

The previous prime is 5161661059. The next prime is 5161661111. The reversal of 5161661099 is 9901661615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5161661099 - 2²⁴ = 5144883883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5161661009) 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 7 ways as a sum of consecutive naturals, for example, 704012 + ... + 711305.

It is an arithmetic number, because the mean of its divisors is an integer number (738795996).

Almost surely, 2^5161661099 is an apocalyptic number.

5161661099 is a deficient number, since it is larger than the sum of its proper divisors (748706869).

5161661099 is a wasteful number, since it uses less digits than its factorization.

5161661099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415845.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 5161661099 is about 71844.7012590351. The cubic root of 5161661099 is about 1728.2099272841.

The spelling of 5161661099 in words is "five billion, one hundred sixty-one million, six hundred sixty-one thousand, ninety-nine".