61165163 has 4 divisors (see below), whose sum is σ = 61347000. Its totient is φ = 60983328.

The previous prime is 61165141. The next prime is 61165177. The reversal of 61165163 is 36156116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61165163 - 2¹⁰ = 61164139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61165103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90413 + ... + 91086.

It is an arithmetic number, because the mean of its divisors is an integer number (15336750).

Almost surely, 2^61165163 is an apocalyptic number.

61165163 is a deficient number, since it is larger than the sum of its proper divisors (181837).

61165163 is a wasteful number, since it uses less digits than its factorization.

61165163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181836.

The product of its digits is 3240, while the sum is 29.

The square root of 61165163 is about 7820.8160060188. The cubic root of 61165163 is about 394.0046788419.

The spelling of 61165163 in words is "sixty-one million, one hundred sixty-five thousand, one hundred sixty-three".