36643601 has 4 divisors (see below), whose sum is σ = 36657204. Its totient is φ = 36630000.

The previous prime is 36643567. The next prime is 36643603. The reversal of 36643601 is 10634663.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26884225 + 9759376 = 5185^2 + 3124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36643601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36643603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 8651.

It is an arithmetic number, because the mean of its divisors is an integer number (9164301).

Almost surely, 2^36643601 is an apocalyptic number.

It is an amenable number.

36643601 is a deficient number, since it is larger than the sum of its proper divisors (13603).

36643601 is an equidigital number, since it uses as much as digits as its factorization.

36643601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13602.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 36643601 is about 6053.3958238331. The cubic root of 36643601 is about 332.1488209997.

The spelling of 36643601 in words is "thirty-six million, six hundred forty-three thousand, six hundred one".