36561663 has 24 divisors (see below), whose sum is σ = 55429920. Its totient is φ = 23190720.

The previous prime is 36561599. The next prime is 36561677. The reversal of 36561663 is 36616563.

It is a happy number.

36561663 is a `hidden beast` number, since 36 + 5 + 616 + 6 + 3 = 666.

It is not a de Polignac number, because 36561663 - 2⁶ = 36561599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36561683) 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 23 ways as a sum of consecutive naturals, for example, 17545 + ... + 19517.

It is an arithmetic number, because the mean of its divisors is an integer number (2309580).

Almost surely, 2^36561663 is an apocalyptic number.

36561663 is a deficient number, since it is larger than the sum of its proper divisors (18868257).

36561663 is a wasteful number, since it uses less digits than its factorization.

36561663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2076 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 36561663 is about 6046.6240994459. The cubic root of 36561663 is about 331.9010658663.

The spelling of 36561663 in words is "thirty-six million, five hundred sixty-one thousand, six hundred sixty-three".