36156561 has 12 divisors (see below), whose sum is σ = 56079792. Its totient is φ = 20660808.

The previous prime is 36156553. The next prime is 36156577. The reversal of 36156561 is 16565163.

It is not a de Polignac number, because 36156561 - 2³ = 36156553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36156061) 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, 122835 + ... + 123128.

It is an arithmetic number, because the mean of its divisors is an integer number (4673316).

Almost surely, 2^36156561 is an apocalyptic number.

It is an amenable number.

36156561 is a deficient number, since it is larger than the sum of its proper divisors (19923231).

36156561 is a wasteful number, since it uses less digits than its factorization.

36156561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245980 (or 245973 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 36156561 is about 6013.0325959536. The cubic root of 36156561 is about 330.6706928915.

The spelling of 36156561 in words is "thirty-six million, one hundred fifty-six thousand, five hundred sixty-one".