32636561 has 2 divisors, whose sum is σ = 32636562. Its totient is φ = 32636560.

The previous prime is 32636557. The next prime is 32636573. The reversal of 32636561 is 16563623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 12780625 = 4456^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 32636561 - 2² = 32636557 is a prime.

It is a super-2 number, since 2×32636561² = 2130290227813442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (32636501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16318280 + 16318281.

It is an arithmetic number, because the mean of its divisors is an integer number (16318281).

Almost surely, 2^32636561 is an apocalyptic number.

It is an amenable number.

32636561 is a deficient number, since it is larger than the sum of its proper divisors (1).

32636561 is an equidigital number, since it uses as much as digits as its factorization.

32636561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 32.

The square root of 32636561 is about 5712.8417622056. The cubic root of 32636561 is about 319.5715653145.

The spelling of 32636561 in words is "thirty-two million, six hundred thirty-six thousand, five hundred sixty-one".