36573561 has 12 divisors (see below), whose sum is σ = 53068288. Its totient is φ = 24271704.

The previous prime is 36573557. The next prime is 36573577. The reversal of 36573561 is 16537563.

It is a happy number.

36573561 is a `hidden beast` number, since 36 + 573 + 56 + 1 = 666.

It is not a de Polignac number, because 36573561 - 2² = 36573557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36523561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7105 + ... + 11118.

Almost surely, 2^36573561 is an apocalyptic number.

It is an amenable number.

36573561 is a deficient number, since it is larger than the sum of its proper divisors (16494727).

36573561 is a wasteful number, since it uses less digits than its factorization.

36573561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18452 (or 18449 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 36573561 is about 6047.6078741929. The cubic root of 36573561 is about 331.9370646902.

The spelling of 36573561 in words is "thirty-six million, five hundred seventy-three thousand, five hundred sixty-one".