36163561 has 4 divisors (see below), whose sum is σ = 41329792. Its totient is φ = 30997332.

The previous prime is 36163531. The next prime is 36163579. The reversal of 36163561 is 16536163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16536163 = 7 ⋅2362309.

It is a cyclic number.

It is not a de Polignac number, because 36163561 - 2⁵ = 36163529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36163511) 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, 2583105 + ... + 2583118.

It is an arithmetic number, because the mean of its divisors is an integer number (10332448).

Almost surely, 2^36163561 is an apocalyptic number.

It is an amenable number.

36163561 is a deficient number, since it is larger than the sum of its proper divisors (5166231).

36163561 is an equidigital number, since it uses as much as digits as its factorization.

36163561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166230.

The product of its digits is 9720, while the sum is 31.

The square root of 36163561 is about 6013.6146368054. The cubic root of 36163561 is about 330.6920310702.

The spelling of 36163561 in words is "thirty-six million, one hundred sixty-three thousand, five hundred sixty-one".