36644537 has 8 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 33754432.

The previous prime is 36644501. The next prime is 36644539. The reversal of 36644537 is 73544663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36644537 - 2⁸ = 36644281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36644537.

It is not an unprimeable number, because it can be changed into a prime (36644539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22133 + ... + 23730.

It is an arithmetic number, because the mean of its divisors is an integer number (4953312).

Almost surely, 2^36644537 is an apocalyptic number.

It is an amenable number.

36644537 is a deficient number, since it is larger than the sum of its proper divisors (2981959).

36644537 is a wasteful number, since it uses less digits than its factorization.

36644537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45927.

The product of its digits is 181440, while the sum is 38.

The square root of 36644537 is about 6053.4731353166. The cubic root of 36644537 is about 332.1516490391.

The spelling of 36644537 in words is "thirty-six million, six hundred forty-four thousand, five hundred thirty-seven".